PTEROSAURIAN
Pter`o*sau"ri*an, a. (Paleon.)
Defn: Of or pertaining to the Pterosauria.
PTEROSTIGMA
Pter`o*stig"ma, n.; pl. Pterostigmata. Etym: [NL., fr. Gr. (Zoöl.)
Defn: A thickened opaque spot on the wings of certain insects.
PTEROTIC
Pte*ro"tic, a. Etym: [Gr. (Anat.)
Defn: Of or pertaining to, or designating, a bone between the proötic and epiotic in the dorsal and outer part of the periotic capsule of many fishes. — n.
Defn: The pterotic bone.
Note: The pterotic bone is so called because fancied in some cases to resemble in form a bird's wing
PTERYGIUM
Pte*ryg"i*um, n.; pl. E. Pterygiums, L. Pterygia. Etym: [NL., fr. Gr.
(Med.)
Defn: A superficial growth of vascular tissue radiating in a fanlike manner from the cornea over the surface of the eye.