/ Dictionary / Index R rectus: Meaning and Definition of Find definitions for: rec•tus Pronunciation: (rek'tus), [key] — pl. -ti any of several straight muscles, as of the abdomen, thigh, eye, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rectus (Thesaurus) rectum recumbent Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language