/ Dictionary / Index O octamer: Meaning and Definition of Find definitions for: oc•ta•mer Pronunciation: (ok'tu-mur), [key] — n. Biochem. an eight-molecule complex. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. octal octamerous Related Content Daily Word Quiz: mongrel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language