The Collaborative International Dictionary of English v.0.48:

nymphalid \nymphalid\ n.
   Any butterfly of the family Nymphalidae, consisting of
   medium to large butterflies found worldwide, typically having
   brightly colored wings and much-reduced nonfunctional
   forelegs carried folded on the breast.

   Syn: nymphalid butterfly, brush-footed butterfly, four-footed
        butterfly.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

nymphalid
    n 1: medium to large butterflies found worldwide typically
         having brightly colored wings and much-reduced
         nonfunctional forelegs carried folded on the breast [syn:
         nymphalid, nymphalid butterfly, brush-footed
         butterfly, four-footed butterfly]