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The Collaborative International Dictionary of English v.0.48 (gcide)

Frog \Frog\ (fr[o^]g), n. [AS. froggu, frocga a frog (in
sensel); akin to D. vorsch, OHG. frosk, G. frosch, Icel.
froskr, fraukr, Sw. & Dan. fr["o].]
1. (Zool.) An amphibious animal of the genus {Rana} and
related genera, of many species. Frogs swim rapidly, and
take long leaps on land. Many of the species utter loud
notes in the springtime.
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Note: The edible frog of Europe ({Rana esculenta}) is
extensively used as food; the American bullfrog ({R.
Catesbiana}) is remarkable for its great size and loud
voice.
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2. [Perh. akin to E. fork, cf. frush frog of a horse.]
(Anat.) The triangular prominence of the hoof, in the
middle of the sole of the foot of the horse, and other
animals; the fourchette.
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3. (Railroads) A supporting plate having raised ribs that
form continuations of the rails, to guide the wheels where
one track branches from another or crosses it.
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4. [Cf. fraco of wool or silk, L. floccus, E. frock.] An
oblong cloak button, covered with netted thread, and
fastening into a loop instead of a button hole.
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5. The loop of the scabbard of a bayonet or sword.
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{Cross frog} (Railroads), a frog adapted for tracks that
cross at right angles.

{Frog cheese}, a popular name for a large puffball.

{Frog eater}, one who eats frogs; -- a term of contempt
applied to a Frenchman by the vulgar class of English.

{Frog fly}. (Zool.) See {Frog} hopper.

{Frog hopper} (Zool.), a small, leaping, hemipterous insect
living on plants. The larv[ae] are inclosed in a frothy
liquid called {cuckoo spit} or {frog spit}.

{Frog lily} (Bot.), the yellow water lily ({Nuphar}).

{Frog spit} (Zool.), the frothy exudation of the {frog
hopper}; -- called also {frog spittle}. See {Cuckoo spit},
under {Cuckoo}.
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Frog \Frog\, v. t.
To ornament or fasten (a coat, etc.) with trogs. See {Frog},
n., 4.
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