[1] : The Collaborative International Dictionary of English v.0.48

truffle \truf"fle\ ?; 277, n. of. trufle, f. truffe; akin to
   sp. trufa, tartufo; of uncertain origin; perhaps from l.
   tuber a tumor, knob, truffle. cf. tuber, trifle.
   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.
   1913 webster

   truffle worm zool., the larva of a fly of the genus
      leiodes, injurious to truffles.
      1913 webster
see also:
tuber trifle tuber melanosporum tuber aestivum truffle worm leiodes 

Segmented Worm >> S Words
Segmented Worm, definition of term: Segmented Worm
segmented+worm_pag1.html

Parasitic Worm >> P Words
Parasitic Worm, definition of term: Parasitic Worm
parasitic+worm_pag1.html

Meal Worm >> M Words
Meal Worm, definition of term: Meal Worm
meal+worm_pag1.html

Internet Worm >> I Words
Internet Worm, definition of term: Internet Worm
internet+worm_pag1.html

Guinea Worm >> G Words
Guinea Worm, definition of term: Guinea Worm
guinea+worm_pag1.html