'Dropworm' definitions:

Definition of 'Dropworm'

From: GCIDE

Dropworm \Drop"worm`\ (dr[o^]p"w[^u]rm`), n. (Zool.) The larva of any geometrid moth, which drops from trees by means of a thread of silk, as the cankerworm or inchworm. See inchworm and geometrid. [1913 Webster]