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caddisworm

American  
[kad-is-wurm] / ˈkæd ɪsˌwɜrm /

noun

  1. the aquatic larva of a caddisfly, having an armored head and a pair of abdominal hooks, and typically living in a case built from sand or plant debris.

Etymology

Origin of caddisworm

1615–25; caddis (perhaps plural, taken as singular, of caddy, diminutive of cad larva, ghost) + worm

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.