PSYDRACIUM 



1208 



PTERYGOMA 



by red, elevated spots. P. spontanea, a form of 

 large- whealed urticaria usually affecting covered parts. 

 P. vulgaris. Synonym of Eczema simplex. 

 Psydracium [si-dra'-se-um) [ipvdpa^, a blister or pim- 

 ple : pi., Psydracia"]. A small pustule. 



Psygma [sig'-mali) [fiiyjua], A refrigerant medicine. 



Ptarmic [tar f -mik) [~rapp6g, a sneezing]. Pertaining 



. to the act of sneezing. Sternutatory. Also, a sub- 

 stance that produces sneezing. 



Ptelea (te'-le-ah) \irre/\ea, elm], A genus of poly- 

 petalous shrubs and trees. P. trifoliata, Hop-tree ; 

 Wafer-ash ; Wing-seed. The bark of a shrub yield- 

 ing a bitter tonic extractive. It is a popular tonic in 

 debility and dyspepsia, and is also used as an anthel- 

 mintic. Unof. 



Pteleorrhine [tel'-e-or-in) [ttts/Mo, elm ; pig, nose]. A 

 term applied to the anterior nares when the aperture 

 is asymmetric. 



Ptenopleural ( ten - o - plu f - ral ) [ TrTqvdg, feathered ; 

 irlevpa, side]. In biology, having the sides of the 

 body winged or alate. 



Pteral [ter'-al) [mepov, wing]. In biology, of or per- 

 taining to the wing. Cf. Manal. 



Ptere (lev) [nrepov, feather, wing]. In biology, a 

 wing-like structure. 



Pteridium [ter-id'-e-um) [ TrrepSv, wing]. See Samara. 



Pterion (te'-re-on) [nrepov, wing]. See Cranio?7ietric 

 Points. 



Pterna (ter'-nah) [irrepva]. I. Calcaneum. 2. The 

 heel-pad of birds. 



Ptero- [ter'-o) [nrepov, wing]. A prefix to denote re- 

 semblance to a wing, or wing-shaped. 



Pterocardiac (ter-o-kar' '-de-ak) [nrepov, wing; napciia, 

 the heart]. In biology, applied by Huxley to a wing- 

 like ossicle that articulates with the cardiac ossicle 

 in the stomach of the crawfish. 



Pterocarpous {ter-o-kar' '-pus) [irrepdv, wing ; KapnSg, 

 fruit]. In biology, wing-fruited. 



Pterocarpus [ter-o-kar' -pus) \jrrep6v, wing; mpirSg, 

 fruit]. A genus of tropical leguminous trees. P. 

 draco, of tropical America, affords some of the dragon's 

 blood of commerce. P. erinaceus, of Africa, and 

 P. marsupium, of India, yield kino. P. santali- 

 nus, affords red saunders. 



Pterocaulon (ter-o-kaw' -Ion) \nrep6v, wing ; Kav7,6g, 

 stem]. A genus of the Inuloidece. P. pycnosta- 

 chyum, black-root, a species found in Georgia, where 

 it is used as a tonic, emmenagogue, and alterative. 



Pterodium (ter-o'-de-um). Same as Pteridium. 



Pteroglossine (ter-o-glos' '-in) [ nrepSp, wing ; y/\ucaa, 

 tongue]. In biology, having a feathery or brushy 

 tongue. 



Pterologic (ter-o-loj'-ik) [nrepdv, wing ; 2.6yog, science]. 

 Pertaining to pterology. 



Pterology (ter-ol'-o-je) \nrep6v, wing; Myog, science]. 

 In biology, that department of entomology or orni- 

 thology which treats of the wings. 



Pteropegal (ter-o-pe'-gal) \nrzp6v, wing; irtjydg, fas- 

 tened]. Pertaining to a pteropegum. 



Pteropegum [ter-o-pe' -gum) [mepdv, feather, wing ; 

 TTTjydg, fastened: //., Pteropega]. In biology, the 

 articular socket or surface on the thorax of an insect 

 for the reception of the base of the wing. 



Pter.opodial (ter-o-po'-de-al) [irrepdv, wing; tcoSiov, a 

 small foot]. Pertaining to a pteropodium. 



Pteropodium (tcr-o-po' -de-urn) [irrep6g, wing ; ndfiiov, 

 a small foot]. The podium of a pteropod. 



Pterorhine (ter'-o-rin) [nrep6v, wing; pig, nose]. In 

 biology, having feathered nostrils. 



Pterospora (ter-os' -po-rah) [irrepdv, wing; OTr6pog, 

 seed]. A genus of plants belonging to the order 

 Monotropea. P. andromeda, scaly dragon-claw, 



dragon-root, fever-root, a plant found in New York 

 Vermont, and Canada, and having anthelmintic, dia 

 phoretic, and emmenagogue properties. 



Pterostigma (ter-o-stig' '-rnah ) [-repov, wing ; r 

 a spot]. The stigma on the wings of some insects. 



Pterostigmal (ter-o-stig' -mal ) [nTepov, wing ; r 

 stigma]. Pertaining to a pterostigma. 



Pterostigmatic [ter - o - slig - mat' '- ik) [-repov, winq 

 oriy/xa, stigma]. In biology, having a pterostigma^ 



Pterotheca [ter-o-the' -kah) [irrepov, wing ; 6t,k7), case 

 //. , Pterotheca:] . In biology, that part of the pupa-ca- 

 which covers the developing wings. 



Pterotic (ter-ot'-ik) [irrepov, wing]. Wing-like. 



Pterygial (ter-ij'-e-al) [dim. of irrepv^, wing], Pei 

 taming to a pterygium. 



Pterygium [ter-if-e-um) [dim. of nrepvS, winj 

 Pterygia']. I. A triangular patch of thickened con 

 junctiva, the apex pointing toward the pupil, the 

 fan-shaped base extending toward the canthus. It : 

 most common on the nasal side. 2. One of the ala 



Pterygium. 



nasi. 3. In biology, the generalized vertebrate limb. 

 Cf. Archiplerygium , Icthyopterygium, Cheiroptera 

 Afesopterygium , Metapterygium, Propterygium. P. 

 carnosum, a flesh-like vascular pterygium. P. eras- 

 sum. Synonym of P. carnosum. P. membrana- 

 ceum, a thin, membrane-like pterygium. P. sarco- 

 matosum. Synonym of P. carnosum. P. tenue. 

 Synonym of P. membranacetim. P. unguis, a 

 normal growth of skin over the finger-nail. P. vas- 

 culosum. Synonym of P. carnosum. 



Pterygo- (ter'-ig-o-) [~repv^, wing]. A prefix del 

 connection with or relation to the pterygoid pro< 



Pterygoblast (ter' ' -ig-o-blast ) [trrepv!; , wing ; 

 germ]. In biology, the incipient rudiment or ; 

 of the fin-ray. 



Pterygobranchiate (ter - ig ■ - brang f - ke - at) [ - 

 wing ; (ipayx ta > gi^ s ]- 1° biology, having fe 

 gills. 



Pterygoda (ter-ig-o'-dah) [irrepvy6d?/g, wing like]. In 

 biology, a pair of scales on the mesothora\ 

 insertion of the first legs, in Lepidoptera. ' 



Pterygoid (ter'-ig-oid) [nrepvS, wing; >'•■ 

 Wing-shaped. P. Artery. See Arteries, 

 P. Canal, the Vidian canal. P. Fossa. " 

 P. Muscle. See Muscle. P. Notch. S 

 Fossa. P. Plate, one of the two plates of a pten 

 goid process, q. v. P. Plexus. See Plexus. P 

 Process. See Process, Pterygoid. 



Pterygoidean (ter-ig-oid f -e-au) [zrepvS, wing]. I 

 goid. P. Plaques, the characteristic sop 

 the hard palate in children affected with Bedn»i 

 aphtha-. 



Pterygoma (ter-ig-o f -mah) [wripv^, wing; bpa, tumo 

 A chronic swelling of the labia minora which mtei 

 feres with coitus (Severin). 



