Frog n.
 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.
 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.
 2.  Anat. The triangular prominence of the hoof, in the middle of the sole of the foot of the horse, and other animals; the fourchette.
 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.
 4.  An oblong cloak button, covered with netted thread, and fastening into a loop instead of a button hole.
 5. The loop of the scabbard of a bayonet or sword.
 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 larvæ 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.


 Hop·per n.
 1. One who, or that which, hops.
 2. A chute, box, or receptacle, usually funnel-shaped with an opening at the lower part, for delivering or feeding any material, as to a machine; as, the wooden box with its trough through which grain passes into a mill by joining or shaking, or a funnel through which fuel passes into a furnace, or coal, etc., into a car.
 3. Mus. See Grasshopper, 2.
 4. pl. A game. See Hopscotch.
 5. Zool. (a) See Grasshopper, and Frog hopper, Grape hopper, Leaf hopper, Tree hopper, under Frog, Grape, Leaf, and Tree. (b) The larva of a cheese fly.
 6. Naut. A vessel for carrying waste, garbage, etc., out to sea, so constructed as to discharge its load by a mechanical contrivance; -- called also dumping scow.
 Bell and hopper Metal., the apparatus at the top of a blast furnace, through which the charge is introduced, while the gases are retained.
 Hopper boy, a rake in a mill, moving in a circle to spread meal for drying, and to draw it over an opening in the floor, through which it falls.
 Hopper closet, a water-closet, without a movable pan, in which the receptacle is a funnel standing on a draintrap.
 Hopper cock, a faucet or valve for flushing the hopper of a water-closet.

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