The Collaborative International Dictionary of English v.0.48:

escargot \es`car*got"\ ([e^]s`k[aum]r*g[=o]"), n. [F. snail.]
   any edible terrestrial snail prepared as food; as a dish, it
   is usually served in the shell with a sauce of melted butter
   and garlic.

   Syn: snail.
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

escargot
    n 1: edible terrestrial snail usually served in the shell with a
         sauce of melted butter and garlic [syn: escargot,
         snail]