noun
also egg·er ˈegə(r), ˈāg-
( -s )
Etymology: eggar alteration of egger; egger from egg (II) + -er; from the shape of the cocoon
: any of various moths of the family Lasiocampidae (as many members of the genera Eriogaster and Lasiocampa ) that have nonfunctional mouthparts as adults and plumose antennae in the males and produce larvae that feed on the foliage of trees