American Heritage® Dictionary of the English Language, Fourth Edition
- n. The larva of a common tiger moth (Estigmene acrea) that feeds destructively on various grasses.
GNU Webster's 1913
- adj. (Zoöl.) an American bombycid moth (Spilosoma acræa which is very destructive to the salt-marsh grasses and to other crops. Called also
woolly bear. See Illust. under Moth, Pupa, and Woolly bear, under Woolly.
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