/ Dictionary / Index T transfection: Meaning and Definition of Find definitions for: trans•fec•tion Pronunciation: (trans-fek'shun), [key] — n. Biotech. the insertion into a cell of a bacterial plasmid that contains a foreign virus or genetic material. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. transfect transfer Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language