perforant (per forant)

[L. per for an(t-)s, ppr. of per for are, perforate: see perforate.] Perforating, as the tendon of a flexor muscle. Per for at a (per-fō-rā'tä), n. pl. [NL., neut. pl. of L. perforatus, perforate: see perforate, a.] 1. One of the groups into which Edwards and Haime (1850) divide the corals: distinguished from Aporosa, Tabulata, and Rugosa. It includes the Madreporida, Poritidæ, etc. Also called Porosa.-2. The perforate foraminifers, a large group (subcla , order, or suborder) of filose protozoans inclosed in a test perforated with numerous for am in ules besides the main opening, through all of which the thready pseudopods may protrude: opposed to Imp erf or at a. Leading forms are the Textulariidæ, Lagenidæ, Globigerinidæ, Rotaliidæ, and Nummulinidæ. perforate (per'fo-rat), v. t.; pret. and pp. per forated, ppr. perforating. [L. perforatus, pp. of per for are, bore through (> It. per for are = Sp. Pg. perforar = F. perforer ), perforator There is an abundant supply of nectar in the nectary of Tropæolum tricolor, yet I have found this plant untouched in more than one garden, while the flowers of other plants had been extensively perforated . Darwin , Cro and Self Fertilisation, p. 427. = Syn. Bore through , Pierce , etc. See penetrate. perforate (per'fo-rat), a . [L. perforatus , pp.: see the verb.] Bored or pierced through; penetrated. An earthen pot perforate at the bottom. Bacon , Nat. Hist. Specifically-(a) In bot . , pierced with one or more small holes, or, more commonly, having translucent dots which resemble holes, as in most plants of the order Hyper i cineæ . (b) In ornith ,, noting the nostril of a bird when lacking a nasal septum, so that a hole appears from side to side of the bill, as in the turkey-buzzard, crane, etc. (c) In an at., open; opened through; affording pa age or communication; having the character or quality of a perforation; for am in ate. (d) In zool ., full of little holes or perforations; cribrose; foraminulate; specifically, of or pertaining to the Per for at a : as, a perforate coral; a perforate foraminifer. Perforate elytra, in entom . , elytra which have a discal perforation, as in certain Ca idæ or tortoise-beetles. perforated (per'fō-rā-ted), p . a . [Pp. of perfo rate, v.] 1. Same as perforate .-2. By extension, cut through in many places and with irregular and somewhat large openings. Compare à jour . A carved oak panel by Grinling Gibbons; the panel is perforated and carved both sides alike. W. S. Ogden, Antique Furniture. 3. In her., same as cleché. - Perforated file. See filel.-Perforated medallion. See pierced medallion, under pierced. - Perforated space. (a) Anterior, a depre ion on either side, near the entrance of the Sylvian fi ure, floored with gray matter, and pierced with numerous small foramina for the pa age of blood-ve els, most of which are destined for the corpus striatum, immediately above. (b) Posterior, a deep fo a situated back of the corpora albicantia, and between the crura cerebri, perforated by numerous holes for the pa age of blood-ve els. per for at i, n. Plural of perforatus. perforating (per'fō-rā-ting), p. a. In an at., specifically, perforant; pa ing through a perforation: applied to the deep flexor muscles of the fingers or toes. See perforans. - Perforating arteries. (a) Of the foot, small communicating branches between the dorsal and plantar arteries, in the intero eous spaces and near the clefts of the toes. (b) Of the hand, branches of communication between the deep palmar artery and the dorsal intero eous arteries, through the intero eous spaces. (c) Of the thigh, usually four branches of the pro fund a artery which pierce the adductor muscles to supply the parts at the back of the thigh. (d) Of the thorax, branches of the internal mammary which pierce the intercostal muscles to supply the pectoral muscle, skin, and mammary gland. - Perforating cutaneous nerves, perforating nerve of Ca er. See nerve. - Perforating fibers of bone. Same as Sharpey's fibers (which see, under fiber1 ). - Perforating peroneal artery, the anterior peroneal. - Perforating rods of Sharpey. Same as Sharpey's fibers (which see, under fiber1 ).-Perforating ulcer of the foot, an ulcer beginning on the sole and usually obstinately progre ive, involving the deeper ti ues, including the bones. It has been observed in tabes, in dementia paralytic a, and with other nervous lesions. Also called perforating disease of the foot, malum perforans ped is, mal perforant du pied. A similar condition has been found in the hand.