from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The larva of either of two moths (Paleacrita vernata or Alsophila pometaria), destructive to fruit and shade trees.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Either of two caterpillars, the larvae of geometrid moths, that are destructive to fruit, buds and leaves.
- n. A corrupting or destructive force.
from the GNU version of the Collaborative International Dictionary of English
- n. The larva of two species of geometrid moths which are very injurious to fruit and shade trees by eating, and often entirely destroying, the foliage. Other similar larvæ are also called cankerworms.
from The Century Dictionary and Cyclopedia
- n. A name given to certain caterpillars which are very destructive to fruit- and shade-trees.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. green caterpillar of a geometrid moth; pest of various fruit and shade trees
From canker + worm. (Wiktionary)