/ Dictionary / Index I interleukin 2: Meaning and Definition of Find definitions for: interleukin 2 Pronunciation: [key] a lymphokine protein, secreted by T cells in response to antigen and interleukin 1, that stimulates the proliferation of T cells. a form of this protein produced by genetic engineering and used experimentally in immunotherapy. Abbr.: IL-2&hasp;&hasp; Cf. LAK cell. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. interleukin 1 interleukin 3 Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language