/ Dictionary / Index O orthotropous: Meaning and Definition of Find definitions for: or•thot•ro•pous Pronunciation: (ôr-tho'tru-pus), [key] (of an ovule) straight and symmetrical, with the chalaza at the evident base and the micropyle at the opposite extremity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: orthotropous (Thesaurus) orthotropism orthoxylene Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language