- See under webworm.
Origin of fall webworm
An Americanism dating back to 1860–65
- the larva of any of several moths, as Hyphantria cunea (fall webworm) or Loxostege similalis (garden webworm), which spins a web over the foliage on which it feeds.
Origin of webworm
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018