/ Dictionary / Index C caudal fin: Meaning and Definition of Find definitions for: cau'dal fin' Pronunciation: [key] the terminal vertical fin of a fish. Also calledSee diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. caudal anesthesia caudate Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language