The Collaborative International Dictionary of English v.0.48:

Formicidae \Formicidae\ prop. n.
   The natural family of insects comprising the ants.

   Syn: family Formicidae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Formicidae
    n 1: ants [syn: Formicidae, family Formicidae]