/ Dictionary / Index F fetus: Meaning and Definition of Find definitions for: fe•tus Pronunciation: (fē'tus), [key] — pl. -tus•es. (used chiefly of viviparous mammals) the young of an animal in the womb or egg, esp. in the later stages of development when the body structures are in the recognizable form of its kind, in humans after the end of the second month of gestation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fetus (Thesaurus) fettuccine Alfredo Feuchtwanger Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language