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One of a tribe of crabs which live in holes in the sand along the seashore, and run very rapidly, -- whence the name.

a. & n. from Race, v. t. & i. Racing crab (Zoöl.), an ocypodian.

Same as Sand saucer, below. -- Sand crab. (Zoöl.) (a) The lady crab. (b) A land crab, or ocypodian. -- Sand crack (Far.), a crack extending downward from the coronet, in the wall of a horse's hoof, which often causes lameness. -- Sand cricket (Zoöl.), any one of several species of large terrestrial crickets of the g…