The Collaborative International Dictionary of English v.0.48:

Emmet \Em"met\ ([e^]m"m[e^]t), n. [OE. emete, amete, AS.
   [ae]mete. See Ant.] (Zo["o]l.)
   An ant. [chiefly dialect]
   [1913 Webster]

   Emmet hunter (Zo["o]l.), the wryneck[3], a type of bird
      related to the woodpeckers.
      [1913 Webster]

WordNet (r) 3.0 (2006):

emmet
    n 1: social insect living in organized colonies;
         characteristically the males and fertile queen have wings
         during breeding season; wingless sterile females are the
         workers [syn: ant, emmet, pismire]