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1. An amphibian in the order Anura, which includes the toads; the commonest frog genera are Rana (grass frogs) and Hyla (tree frogs).
2. In veterinary medicine, the spongy triangular cushion on the sole of the horse hoof that helps to absorb the shock of impact.
a. Any of numerous tailless aquatic, semiaquatic, or terrestrial amphibians of the order Anura, characteristically having a short vertebral column, a large head, long hind legs used for leaping, and a tadpole stage as larvae.
b. Any of various usually aquatic members of this order having smoother skin and longer hind legs than the toads.
2. A wedge-shaped, horny prominence in the sole of a horse's hoof.
3. Informal Hoarseness or phlegm in the throat.