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spanworm
span·worm S0604500 (spăn′wûrm′)n. See inchworm.
[From span.]spanworm (ˈspænˌwɜːm) n (Animals) a larva of a type of mothspanworm
spanworm: see inchworminchworm,
name for the larvae of moths of the family Geometridae, a large, cosmopolitan group with over 1,200 species indigenous to North America. Also called measuring worms, spanworms, and loopers, inchworms lack appendages in the middle portion of their body, causing them to
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