/ Dictionary / Index M medusafish: Meaning and Definition of Find definitions for: me•du•sa•fish Pronunciation: (mu-d'su-fish", -zu-, -dy'-), [key] — pl. -fish•es, -fish. a stromateid fish, Icichthys lockingtoni, of deep waters off the coast of California, living as a commensal in and about medusas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. medusa medusan Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language