/ Dictionary / Index C cDNA: Meaning and Definition of Find definitions for: cDNA Pronunciation: [key] complementary DNA: a DNA molecule that is complementary to a specific messenger RNA. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cdna (Thesaurus) CD-I CD player Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language