looper
a larva of the insect family Geometridae (Lepidoptera) —note many looper species are serious defoliators of trees, including the fall cankerworm (Alsophila pometaria), spring cankerworm (Paleacrita vernata), elm spanworm (Ennomos subsignarius), and hemlock looper (Lambdina fiscellaria fiscellaria) —synonym measuringworm, spanworm, geometer, inchworm This definition last updated 07/13/2008