Definition of "webworm" [web•worm]

• Any of various usually destructive caterpillars that construct webs. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The leaves are eaten by mimosa webworm in some areas of North America."
• "~Fall webworm, ~ [17] ~walnut caterpillar, ~ [18] ~and hickory tussock moth."
• "This insect can be controlled with the same spray treatments that are recommended for the fall webworm, and also by crushing or burning the caterpillars when they are clustered on the lower limbs or tree trunks."