cankerworm

American  

[kang-ker-wurm] / ˈkæŋ kərˌwɜrm /

noun

1. an inchworm, the larva of either of two geometrid moths, Paleacrita vernata spring cankerworm and Alsophila pometaria fall cankerworm: a foliage pest of various fruit and shade trees.

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cankerworm British  

/ ˈkæŋkəˌwɜːm /

noun

1. the larva of either of two geometrid moths, Paleacrita vernata or Alsophila pometaria, which feed on and destroy fruit and shade trees in North America

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Etymology

Origin of cankerworm

First recorded in 1520–30; canker + worm