Definitions for palmerwormˈpɑ mərˌwɜrm
Random House Webster's College Dictionary
the larva of a moth, Dichomeris ligulella, of the eastern U.S., that feeds on the leaves of fruit trees.
Origin of palmerworm:
any hairy caterpillar which appears in great numbers, devouring herbage, and wandering about like a palmer. The name is applied also to other voracious insects
in America, the larva of any one of several moths, which destroys the foliage of fruit and forest trees, esp. the larva of Ypsolophus pometellus, which sometimes appears in vast numbers