/ Dictionary / Index C complement-fixation test: Meaning and Definition of Find definitions for: com'ple•ment-fix•a'tion test" Pronunciation: (kom'plu-munt-fik-sā'shun), [key] — Med. Med. a test for diagnosing an infectious disease by detecting the presence of antibody in the blood, based on the fixing of a known quantity of complement to the antigen being tested and the specific antibody that combines with it. Abbr.: CFT Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. complement fixation complementizer Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language