Truffle

Part of speech: noun (n.)

Any one of several kinds of roundish, subterranean fungi, usually of a blackish color. The French truffle (Tuber melanosporum) and the English truffle (T. æstivum) are much esteemed as articles of food. Truffle worm (Zoöl.), the larva of a fly of the genus Leiodes, injurious to truffles. Truffle pig, a pig used for finding truffles.