/ Dictionary / Index C cyanobacteria: Meaning and Definition of Find definitions for: cy•a•no•bac•te•ri•a Pronunciation: (sī"u-nō-bak-tēr'ē-u, sī-an"ō-), [key] — sing. -te•ri•um blue-green algae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cyanobacteria (Thesaurus) cyanoacrylate cyanocobalamin Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language