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Webster 1913 Edition

(drŏp′wûrmˊ)

Noun.

(Zool.)

The larva of any geometrid moth, which drops from trees by means of a thread of silk, as the

cankerworm

inchworm

. See

and

dropworm ‎(plural dropworms)

The larva of any geometrid moth, which drops from trees by means of a thread of silk, such as the cankerworm.