pleurotomoid (plorotomoid)

and n. [ II. n. A shell of the family Pleurotomidæ . pleurotransversalis (plö-rō-trans-ver-sā lis), n.; pl. pleurotransversales (-lēz). [NL., Gr. πλευρά, the pleura, + NL. transversal is, q. v.] An anomalous muscular slip arising from the transverse proce of the seventh cervical vertebra, and inserted into the top of the pleural sac. pleurotribe (plöʻrō-trib), a. [ IMG:content-0431.jpg:[merged small][merged small][merged small][merged small][ocr errors][merged small][graphic][subsumed][merged small][subsumed][merged small][merged small][subsumed][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small] plexus of minute anastomosing blood-ve els, as the choroid plexus, and of similar arrangements of nerves of the spinal and sympathetic systems. -3. In math., a system of one-fold relations. - Aortic plexus, the network of sympathetic nerves on the side and front of the abdominal aorta, between the origins of the superior and inferior mesenteric arteries. Also called inter mesenteric plexus. - Auerbach's plexus, an extensive gangliated plexus of nerves lying between the longitudinal and the circular layer of the small intestine. Also called my enteric plexus. - Axillary plexus. Same as brachial plexus. - Basilar plexus. Same as trans verse sinus (which see, under sinus ). - Brachial plexus. See brachial. - Cardiac plexus, one of the three great pre vertebral plexuses of the sympathetic, situated in the upper thoracic region in front, and between the aorta and the pulmonary artery, where these ve els are in contact. It receives the cardiac branches from the cer vical ganglia and those of the vagus nerves, and gives off the nerves which supply the heart, together with some smaller branches which contribute to the nervous supply of the lungs. That division (the smaller) which lies in the concavity of the arch of the aorta is called the 4558 Plexus an serin us. Same as parotid plexus . - Plexus (see -bility ).] "The quality of being pliable; flexibility; pliablene . Sweet pliability of man's spirit, that can at once surrender itself to illusions which cheat expectation and sorrow of their weary moments! us of the third ventricle. - Plexusganglioformis, the er ganglion, or ganglion of the trunk, of the vagus nerve. Plexusgulæ. Same as esophageal plexus. - Plexus lumbalis, the lumbar plexus. - Plexus nodosus, the ganglion of the trunk of the vagus. - Plexus patellæ, the plexiform network of the kneepan, formed by cutaneous nerves, especially the long saphenous. - Plexus sacral is, the sacral plexus.- Plexus submucosus. Same as Mei ner's plexus. Posterior cervical plexus, a plexus often formed by the internal branches of the posterior divisions is placed behind the arch of the aorta, between it and the end of the trachea. - Carotid plexus. See carotid. -Caudal plexus. Same as coccygeal plexus. - Cavernous plexus. (a) The continuation of the carotid plexus in the cavernous sinus. (b) The continuation of the prostatic plexus, supplying the erectile ti ue of the penis. Also called cavernous nerves. - Cervical plexus, the network of nerves formed by the anterior divisions of the four upper cervical nerves, giving off numerous nerves to the head, neck, and chest, and the phrenic nerve to the diaphragm. A similar plexing of posterior divisions of the three upper cervical nerves is known as the posterior cervical plexus. - Choroid plexuses. See choroid. Ciliary plexus, a fine gangliated network formed from the ciliary nerves, spread over the choroid, and within the ciliary muscle, from which the nerves of the cornea, of the ciliary muscle, and of the iris are derived. - Coccygeal plexus, the connection formed between the anterior divisions of the fourth and fifth sacral and first coccygeal nerves.-Cœliac plexus, the sympathetic plexus of the cœliac artery, continued from the solar plexus, and dividing into the gastric, hepatic, and splenic plexuses. - Colic plexuses, divisions of the superior and inferior mesenteric plexuses accompanying the colic arteries. - Coronary plexus. (a) One of two plexuses, right and left, derived from the cardiac plexus, and accompanying the respective coronary arteries. ( b ) Same as gastric plexus ( b ). - Cystic plexus, a secondary plexus of the hepatic, to the gall-bladder.- Deep jugular plexus, a plexus of lymphatic ve els extending along the internal jugular vein to the base of the cranium. - Deferential plexus, the continuation of the vesical plexus upon the vasa deferent i a and the seminal vesicles. - Diaphragmatic plexus, the phrenic plexus. - Dors i spinal plexus, a network of veins investing the arches of the vertebræ, and receiving branches from the contiguous muscles and skin of the back. - Epigastric plexus, the solar plexus, or solar i plex. —Esophageal plexus, plexiform branches of the pneumogastric nerve on the esophagus. Also called plexus gulæ. - Gastric plexus. (a) One of two plexuses, anterior and posterior, formed by the left and right vagus nerves respectively. (b) A secondary plexus of the cœliac, accompanying the gastric artery. Also called coronary plexus. - Gastroepiploic plexuses, secondary plexuses of the hepatic and splenic, accompanying the gastro-epiploic arteries. - Hemorrhoidal plexus. (a) A plexus of fine nerves derived from the pelvic, vesical, and inferior hemorrhoidal plexuses, penetrating the coats of the rectum. (b) A large and copiously anastomosing network of veins in the lower wall of the rectum, beneath the mucous coat, from which the hemorrhoidal veins proceed. - Hepatic plexus, the largest division of the cœliac plexus, accompanying the hepatic artery in the substance of the liver. -Hypogastric plexus, an intricate sympathetic plexus, formed by the prolongation of the aortic plexus on each side, lying in the interval of the common iliac arteries, invested by a sheath of areolar ti ue. It divides into two parts below, one on each side of the pelvic viscera, forming the pelvic plexuses. Also called superior hypogastric plexus. - Ileocolic plexus, the division of the superior mesenteric plexus accompanying the ileocolic artery. - Inferior dental plexus, a plexus formed by the communications uses, the three large median plexuses formed by the two sympathetic nerves, situated in front of the spine, in the cavity of the thorax, abdomen, and pelvis, and respectively known as the cardiac, solar, and hypogastric plexuses. Prostatic plexus. (a) The continuation of the vesical plexus supplying the prostate body. (b) A plexus of veins surrounding the base of the prostate, formed mainly from the dorsal veins of the penis. - Pterygoid plexus, a close network of veins covering both surfaces of the external pterygoid muscle, receiving tributaries mostly corresponding to the branches of the internal maxillary artery, and emptying into the internal maxillary vein. - Pudendal plexus. (a) A close net of large veins occupying the upper part the pubic arch, between the layers of the triangular ligament, and mainly derived from the dorsal veins of the penis or clitoris. (b) The lower section of the sacral plexus (a). -Pulmonary plexuses, the two plexuses, the anterior and posterior, formed by branches of the vagus and sympathetic on the front and back side respectively of each lung at its root. - Pyloric plexus, a secondary plexus of the hepatic, accompanying the pyloric artery. - Renal plexus, a plexus formed of nerves from the semilunar ganglion, the solar and aortic plexuses, and the smallest splanchnic nerve, accompanying the renal artery and terminating in the substance of the kidney. - Sacral plexus. (a) A plexus formed by the union of the lumbosacral cord and anterior divisions of the three upper sacral nerves, together with a portion of that of the fourth. Its branches of distribution are the superior and inferior gluteal, great and small sciatic, pudic, and muscular. (b) A plexus of veins in the back of the pelvis, tributary to the middle sacral vein.Sacrococcygeal plexus, the series of loops formed by the anastomoses of the external branches of the posterior divisions of the first three sacral nerves, the fourth and fifth posterior sacrals, and the posterior coccygeal. - Sant or in i an plexus, the pudendal plexus of veins. - Solar plexus, the largest of the three great sympathetic plexuses, situated at the upper part of the abdomen, behind the stomach, and in front of the aorta. It consists of an intricate network of nerves, a ociated with ganglia, receiving the upper splanchnic nerves and some branches of the vagus, and giving off numerous branches which accompany the arteries to the principal viscera of the abdomen, constituting secondary plexuses. Its two principal ma es, right and left, are known, from their form, as the semilunar ganglia. Also called epigastric plexus, solar ganglion. Spermatic plexus. (a) A small plexus, derived from the renal and aortic plexuses, accompanying the artery to the testis in the male, to the ovary and uterus in the female. (b) Same as pam pin i form plexus. - Spiral plexus, the plexiform arrangement a umed in the spiral lamina by the nerve-filaments given off from the spiral ganglion of the cochlea. Splenic plexus, one of the divisions of the cœliac plexus, accompanying the splenic artery into the substance of the spleen. - Sub epithelial plexus, the delicate network, formed by the terminal filaments of the ciliary nerves, ramifying on the basement membrane of the ectocornea, or surface of the cornea proper, beneath the epithelium.-Superficial jugular plexus, lymphatic tributaries to the jugular trunk from the occipital, ear, and temporal regions. Superior dental plexus, the series of loops formed by branches of the dental nerves of the upper jaw, from Sterne , Sentimental Journey, p. 84. Pliability in politics, if accompanied by honesty, is a virtue. H. Adams , Gall at in, p. 577. pliable (pli'a-bl), a. [ The younger they are when they begin with that art [music], the more pliable and nimble their fingers are touching the instrument. Sharp , Works, VI. viii. 2. Flexible in disposition; easy to be bent, inclined, or persuaded; readily yielding to influence, arguments, persuasion, or discipline. At the last, having found the citys plyable to theyr desyer, they bounde the one to another by othe, and wrought sure wyth hostages and money. Golding , tr. of Cæsar, fol. 146. So is the heart of some men; when smitten by God it seems soft and pliable . Jer. Taylor , Works, II. xii. Since I was of understanding to know we knew nothing, my reason hath been more pliable to the will of faith. Sir T. Browne , Religio Medici, i. 10. =Syn. 1. Pliant, supple. - 2. Compliant, yielding, tractable. The quality of pliablene (pli'a-bl-nes), n. being pliable; flexibility; the quality of yielding readily to force or to moral influence; pliability: as, the pliablene of a plant; pliable ne of disposition. The chosen ve el hath by his example taught me this charitable and holy pliablene e . Bp . Hall , Satan's Fiery Darts, iii. 5. Compare the ingenuous pliablene to virtuous counsels in youth, as it comes fresh and untainted out of the hands of nature, with the confirmed obstinacy in most sorts of sin that is to be found in an aged sinner. South , Sermons. pliably (pli'a-bli), adv . In a pliable manner; yieldingly; compliantly. This worthy Doctor [George Morley]... was...not of the number of those lukewarm irreligious Temporizers who had learn'd pliably to tack about, as still to be ready to receive whatever revolution and turn of affairs should Wood, Athenæ Oxon., II. 771. happen. pliancy (plīʼan-si), n. [ To be overlooked for want of political pliancy is a circumstance I need not blush to own. Anecdotes of Bp. Watson, І. 305. Avaunt all specious pliancy of mind In men of low degree, all smooth pretence! I better like a blunt indifference. Words worth, A High-Minded Spaniard. Jane, you please me, and you master me you seem tó submit, and I like the sense of pliancy you impart. Charlotte Brontë , Jane Eyre, xxiv. Insolence had taken the place of pliancy , and the former slave now applied the chain and whip to his master. Motley, Dutch Republic, III. 158. There was in Bacon an invariable pliancy in the presence of great persons which disqualified him for the task of giving wise and effectual counsel. E. A. Abbott , Bacon, p. 21. lower jaw. Inferior hypogastric plexus. Same as pelvic plexus. - Inferior mesenteric plexus, a sympathetic plexus derived from the left lateral part of the aortic plexus, and surrounding the artery of the same ame.-Infra-orbital plexus, a plexus formed by the union of the labial branches of the superior maxillary nerve with branches of the facial nerve. - Inter epithelial plexus, the fine network of nerves among the cells of the epithelium of the cornea. - Inter mesenteric plexus. Same as aortic plexus. - Inter muscular plexuses, gangliated nerve-plexuses in the substance of organs having unstriated muscle-fibers. - Intra spinal plexus, an irregular network of veins investing the spinal canal, emptying into the intercostal, lumbar, vertebral, and lateral sacral veins. -Ischiatic plexus, the upper part of the sacral plexus. - Lumbar plexus. See lumbar 1. - Mei ner's plexus, the gangliated plexus of the submucous layer of the small intestine, formed by branches derived from Auerbach's plexus.- Meningeal plexus, the continuation of the carotid plexus upon the middle meningeal artery. - Mesenteric plexus, the sympathetic plexus accompanying a mesenteric artery. The superior is derived from the great solar plexus; the inferior chiefly from the aortic plexus.- My enteric plexus. Same as Auerbach's plexus. Obturator plexus, the plexus of veins surrounding the obturator foramen. Ophthalmic plexus, the continuation of the cavernous plexus on the ophthalmic artery. - Ovarian plexus. See pam pin i form plexus. - Pam pin i form, pancreatic, patellar, pelvic plexus. See the adjectives. - Pancreaticoduodenal plexus, a secondary plexus of the hepatic, accompanying the superior pancreaticoduodenal artery. - Parotid plexus, prarenal plexus, a secondary plexus derived from the solar plexus, terminating in the suprarenal body, and receiving branches from one of the splanchnic nerves.Tonsilar plexus, a plexus formed around the tonsil by the tonsilar branches of the glo opharyngeal nerve.Triangular plexus, the plexiform arrangement a umed by the bundles of fibers of the sensory root of the fifth nerve before ending in the Ga er i an ganglion. Tympanic plexus, a plexus formed by the branches of the tympanic nerve, in union with others from the facial and sympathetic, in the mucous lining of the middle ear.Uterine plexus. (a) A plexus derived from the pelvic plexus, pa ing through the broad ligament with the uterine artery to be distributed to the uterus. (b) Venous channels at the sides of the uterus, and in the broad ligaments, emptying into the ovarian veins. - Vaginal plexus, a network of veins surrounding the vagina, especially in its lower part. - Venous plexus, an anastomosing set of veins, forming a network. There are several such, as the ovarian, pam pin i form, pharyngeal, prostatic, pterygoid, spermatic, uterine, and vaginal. - Vertebral plexus, the sympathetic plexus on the vertebral artery, joined by filaments from the lower cervical nerves. - Vesical plexus. (a) A plexus of veins surrounding the muscufar coat of the bladder. (b) A plexus derived from the pelvic plexus, distributed to the lower part and side of the bladder, the prostate, and the seminal vesicle. - Vesicovaginal plexus, a plexus derived from the pelvic plexus, distributed to the vagina and bladder. - Vidian plexus, the plexus formed by the Vidian nerve about the Vidian artery. pleiant, ploiant, F. pliant, flexible, supple, pliant, folding, F. plier ), fold: see ply.] 1. Capable of being easily bent; flexible; supple; limber; lithe: as, a pliant twig. So pliant were His goodly timber'd Limbs, and yet so stout, That wax and steel seem'd kindly marry'd there. J. Beaumont , Psyche, i. 61. Me of a pliant metall you shall finde; See then you cast and shape me to your minde. Heywood , Dialogues. Who foremost now delight to cleave With pliant arm thy gla y wave? Gray, Prospect of Eton College. A well organized and very pliant hand may determine to occupations requiring manual dexterity. Beddoes, Mathematical Evidence, note. Pliant as a wand of willow. Long fellow , Hiawatha, vi. Paint that figure's pliant grace. M. Arnold , Switzerland, i. 2. Easily bent or inclined to any particular course; readily influenced for good or evil; easy to be persuaded; yielding. I.. Took once a pliant hour, and found good means To draw from her a prayer of earnest heart. Shak ., Othello, i. 3. 151. No man has his servant more obsequious and pliant. B. Jonson, Every Man out of his Humour, i. 1. pliant Whatsoever creates fear... is apt to entender the spirit, and make it devout and pliant to any part of duty. Jer. Taylor, Holy Living, iv. 7. His pliant soul gave way to all things base, He knew no shame, he dreaded no disgrace. Crabbe , Works, I. 63. pliantly (pli'ant-li), adv . In a pliant manner; flexibly; yieldingly. pliantne (pli'ant-nes), n. The quality of being pliant; flexibility. plica (pli'kä), n.; pl. plicæ (-sē). [NL., or inclined to one side, so that it appears like a fold; specifically, a longitudinal ridge on the internal surface of each elytron, near the outer edge; an elytral ridge, found in certain Cole opter a.-5. In herpet.: ( a ) [ cap.] A genus of American iguanoid lizards: named from the folds of skin on the sides. J. E. Gray. (b) A lizard of this genus: as, the dotted plica, P. punctata.-6. In mensural music: (a) A kind of grace-note. (b) A kind of ligature. (c) The stem or tail of a note. - Elytral plica. See def. 4, and elytral.-Plica alaris, in ornith.: (a) The feathered fold of skin on the fore border of the wing which occupies the reëntrant angle made by the bones of the upper arm and forearm, stretching from the shoulder to the wrist. (b) The bend or flexure of the wing at the carpal joint. [Rare.]-Plicæ adipose. Same as alar ligaments (which see, under alar ). - Plicæ recto vesica les. Same as plicæ semi luna res Douglas i i. - Plicæ semi luna res Douglas i i, two folds of the peritoneum between the rectum and the bladder. See cut under peritoneum. - Plica gubernatrix, that peritoneal fold which is in relation with the gubernaculum testis. - Plica inter is, in ornith., webbing or palmation of the toes; palama.- Plica primitiva, in embryol., the primitive fold; either lip of the primitive furrow of the early embryo of a vertebrate.-Plica semilunar is, in human an at., a fold of conjunctival mucous membrane at the inner corner of the eye: the rudiment of a nictitating membrane or third eyelid. See cut under eyel. Plicacea (pli-kā'sē-ä), n.pl. [NL., plical (pli'kal), a. [