/ Dictionary / Index O octomerous: Meaning and Definition of Find definitions for: oc•tom•er•ous Pronunciation: (ok-tom'ur-us), [key] — adj. octamerous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. octogenarian octometer Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language