/ Dictionary / Index C caseworm: Meaning and Definition of Find definitions for: case•worm Pronunciation: (kās'wûrm"), [key] — n. a caddisworm or other insect larva that constructs a case around its body. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: caseworm (Thesaurus) caseworker Casey Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language