/ Dictionary / Index D Decca: Meaning and Definition of Find definitions for: Dec•ca Pronunciation: (dek'u), [key] — n. a British radio navigational aid by which a fix is obtained by determining phase difference between continuous-wave signals from two synchronized fixed signals. Cf. loran. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. decay time Deccan Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language