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Pteridology
n.
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That department of botany which treats of ferns.
Pteridomania
n.
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A madness, craze, or strong fancy, for ferns.
Pteridophyta
n. pl.
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A class of flowerless plants, embracing ferns, horsetails, club mosses, quillworts, and other like plants. See the Note under Cryptogamia.
Pterobranchia
n. pl.
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An order of marine Bryozoa, having a bilobed lophophore and an axial cord. The genus Rhabdopleura is the type. Called also Podostomata. See Rhabdopleura.
Pteroceras
n.
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A genus of large marine gastropods having the outer border of the lip divided into lobes; -- called also scorpion shell.
Pterocletes
n. pl.
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A division of birds including the sand grouse. They are in some respects intermediate between the pigeons and true grouse. Called also Pteroclomorphae.
Pterodactyl
n.
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An extinct flying reptile; one of the Pterosauria. See Illustration in Appendix.
Pterodactyli
n. pl.
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Same as Pterosauria.
Pteroglossal
a.
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Having the tongue finely notched along the sides, so as to have a featherlike appearance, as the toucans.
Pteron
n.
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The region of the skull, in the temporal fossa back of the orbit, where the great wing of the sphenoid, the temporal, the parietal, and the frontal hones approach each other.
Pteropappi
n. pl.
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Same as Odontotormae.
Pterophore
n.
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Any moth of the genus Pterophorus and allied genera; a plume moth. See Plume moth, under Plume.
Pteropod
n.
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One of the Pteropoda.
Pteropoda
n. pl.
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A class of Mollusca in which the anterior lobes of the foot are developed in the form of broad, thin, winglike organs, with which they swim at near the surface of the sea.
Pteropodous
a.
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Of or pertaining to the Pteropoda.
Pterosaur
n.
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A pterodactyl.
Pterosauria
n. pl.
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An extinct order of flying reptiles of the Mesozoic age; the pterodactyls; -- called also Pterodactyli, and Ornithosauria.
Pterosaurian
a.
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Of or pertaining to the Pterosauria.
Pterostigmata
pl.
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of Pterostigma
Pterostigma
n.
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A thickened opaque spot on the wings of certain insects.
Pterotic
a.
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Of or pertaining to, or designating, a bone between the prootic and epiotic in the dorsal and outer part of the periotic capsule of many fishes.
Pterotic
n.
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The pterotic bone.
Pterygiums
pl.
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of Pterygium
Pterygia
pl.
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of Pterygium
Pterygium
n.
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A superficial growth of vascular tissue radiating in a fanlike manner from the cornea over the surface of the eye.
Pterygoid
a.
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Like a bird's wing in form; as, a pterygoid bone.
Pterygoid
a.
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Of, pertaining to, or in the region of, the pterygoid bones, pterygoid processes, or the whole sphenoid bone.
Pterygoid
n.
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A pterygoid bone.
Pterygomaxillary
a.
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Of or pertaining to the inner pterygoid plate, or pterygoid bone, and the lower jaw.
Pterygopalatine
a.
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Of or pertaining to the pterygoid processes and the palatine bones.