caseworm

[keys-wurm]

noun

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

Origin of caseworm

First recorded in 1600–10; case2 + worm
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for caseworm

caseworm

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