Inchworm

n.

1.

(Zool.) The larva of any geometrid moth. It progresses forward by first bringing the rear end of the body forward, forming a loop, then moving the front part of the body; called also measuring worm, measuringworm, spanner, and looper. See Geometrid.

Noun

1.

inchworm - small hairless caterpillar having legs on only its front and rear segments; mostly larvae of moths of the family Geometridae Synonyms: looper, measuring worm

caterpillar, looper, measuring worm