ARCHEAOCYTE

ve els. dental a., an arch formed by the alveolar proce on each jaw, containing teeth and covered by the gums. embryonic a’s, fetal a’s, the aortic, branchial, mandibular, hyoid, pulmonary, and thyrohyoid arches. fallopian a., the fallopian ligament. See ligament. femoral a., Poupart’s ligament. glo opal a tine a., the anterior pillar of the fauces. Haller’s a’s, the external and internal arcuate ligaments of the diaphragm. hemal a., hsemal ἃ., the arch formed by the body and proce es of a vertebra, a pair of ribs, and the sternum, or other like parts: also the sum of all such arches. hyoid a., the second fetal arch which persists in the styloid proce , the stylo hyoid ligament, and le er cornu of the hyoid bone. Langer’s axillary a., a thickened border of fascia forming a bridge acro the occipital groove. malar a., the zygomatic bone. mandibular a., the fetal arch whence are developed the jaw bones, with the malleus and incus. a., the arch formed by the nasal bones and by the nasal proce es of the superior maxilla. neural a., the arch of a vertebra formed by its pedicles and lamina; also the sum of all such arches. palatine a’s, the pillars of the fauces; the two arches of mucous membrane inclosing the muscles at the sides of the pa age from the mouth to the pharynx. They are anterior or glo opal a tine arches and posterior or pharyngopalatine arches. a., deep, an arch formed in the palm by the communicating branch of the ulnar and the radial artery. a., superficial, an arch in the palm forming the termination of the ulnar artery. pharyngeal a’s, the branchial arches of the fetus. Ῥ palatine a., the posterior pillar of the fauces. plantar a., the arch formed by the external plantar artery and the dorsal is is. post aural a’s, the branchial arches. pubic a., a portion of the pelvis formed by the rami of the ischia and of the pubic bone on each side. pullary a., the fifth of the aortic arches on the left side: it becomes the pulmonary artery. Riolan's a., the arch formed by the transverse me so colon. stylo hyoid a., one of the embryonic arches made up of four segments, viz.: the pharyngobranckial, which develops into the styloid proce ; the epibranchial, developing into the stylo hyoid ligament; the ceratobranchial and the hy pobranchial, which together develop into the le er cornu of the hyoid bone. supraciliary a., the supraciliary ridge. supra-orbital a., a bony arch formed by the prominent margin of the orbit. tendinous &., the edge of an opening in a fascia which gives pa age to an artery. thyrohyoid a., the third fetal arch: its cartilage is represented by the greater comu of the hyoid bone. Treitz’s a., an arch composed of the left superior colic artery and the mesenteric vein, and lying between the ascending portion of the duodenum and the inner edge of the left kidney. 8. of @ vertebra, the arching portion of a vertebra inclosing the spinal foramen. visceral a’s, the fetal arches. sygomatic a., the arch formed by the malar and temporal bones. archmocyte (ar’ke-o-sit). See archeocyte. Arch a gath us (artsh-ag’ath-us). A Greek surgeon who emigrated to Rome in 219 A. D. arch amphiaster (ark-am/fe-as-ter) (Gr. ἀρχή first + édugé around + ἀστήρ star]. Any amphiaster Producing polar globules. Archangelic a (ar-kan-jel’ik-ah) (L. from Gr. ἀρχαγ- γελικός archangelic]. A genus of umbelliferous ts. See Angelica. arc he bios is (ar’ke-bi-o’sis) [Gr. ἀρχή beginning + Bios life]. The supposed spontaneous generation of organisms. arc he centric (ar-ke-sen’trik) (Gr. ἀρχή beginning + centric]. Denoting a primitive type of struc- ture from which the other types in the members of the group are derived. θ1 ARCH IN EUR ON