The Collaborative International Dictionary of English v.0.48:

Arctiidae \Arctiidae\ n.
   1. 1 a family comprising the tiger moths.

   Syn: family Arctiidae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Arctiidae
    n 1: tiger moths [syn: Arctiidae, family Arctiidae]