Eggar

from WordNet (r) 3.0 (2006)

eggar
    n 1: moth having nonfunctional mouthparts as adults; larvae feed
         on tree foliage and spin egg-shaped cocoons [syn: {eggar},
         {egger}]

from The Collaborative International Dictionary of English v.0.48

Eggar \Eg"gar\, n. [Etymol. uncertain.] (Zo["o]l.)
   Any bombycid moth of the genera {Eriogaster} and
   {Lasiocampa}; as, the oak eggar ({L. roboris}) of Europe.
   [1913 Webster] egg beater