Truf·fle n. Any one of several kinds of roundish, subterranean fungi, usually of a blackish color. The French truffle (Tuber melanosporum) and the English truffle (Tuber aestivum) are much esteemed as articles of food.
Truffle worm Zool., the larva of a fly of the genus Leiodes, injurious to truffles.
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