/ Dictionary / Index T T helper cell: Meaning and Definition of Find definitions for: T helper cell Pronunciation: [key] — Immunol. Immunol. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Thelon thelytokous Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language