/ Dictionary / Index N nudibranch: Meaning and Definition of Find definitions for: nu•di•branch Pronunciation: (n'du-brangk", ny'-), [key] — n. a shell-less, marine snail of the suborder Nudibranchia, having external, often branched respiratory appendages on the back and sides. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nudibranch (Thesaurus) nudi- nudibranchiate Related Content Daily Word Quiz: abdicate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language