/ Dictionary / Index F fish duck: Meaning and Definition of Find definitions for: fish' duck" Pronunciation: [key] — Informal. Informal. merganser. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fish doctor fisher Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language