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caseworm

American

[keys-wurm] / ˈkeɪsˌwɜrm /

noun

a caddisworm or other insect larva that constructs a case around its body.

caseworm British

/ ˈkeɪsˌwɜːm /

noun

another name for a caddis worm

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of caseworm

First recorded in 1600–10; case ² + worm

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023