(n) either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the cornea; it arises from irritation of the pinguecula
‖n. [ NL., fr. Gr. pref. 'archi- (E. arch-) + ptery`gion wing, fin. ] (Anat.) The primitive form of fin, like that of Ceratodus. [ 1913 Webster ]
‖n. [ NL., fr. Gr. ba`sis a base + ptery`gion a fin. ] (Anat.) A bar of cartilage at the base of the embryonic fins of some fishes. It develops into the metapterygium. -- Ba*sip`ter*yg"i*al a. [1913 Webster]
‖n. [ NL., fr. Gr. me`sos middle + &unr_; a fin. ] (Anat.) The middle one of the three principal basal cartilages in the fins of fishes. -- Me*sop`ter*yg"i*al a. [1913 Webster]
‖n. [ NL., fr. Gr. &unr_; after + &unr_; fin. ] (Anat.) The posterior of the three principal basal cartilages in the fins of fishes. -- Me*tap`ter*yg"i*al a. [1913 Webster]
‖n.; pl.Propterygia [ NL., fr. Gr. &unr_; before + &unr_; a fin. ] (Anat.) The anterior of three principal cartilages in the fins of some fishes. -- Prop`ter*yg"i*al a. [1913 Webster]
‖n.; pl. E. Pterygiums L. Pterygia [ NL., fr. Gr. &unr_;, properly a dim, akin to &unr_; a feather. ] (Med.) A superficial growth of vascular tissue radiating in a fanlike manner from the cornea over the surface of the eye. [ 1913 Webster ]
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