/ Dictionary / Index C conceptus: Meaning and Definition of Find definitions for: con•cep•tus Pronunciation: (kun-sep'tus), [key] — pl. -tus•es. the embryo and associated membranes of humans and other highly developed animals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: conceptus (Thesaurus) conceptual realism concern Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language