/ Dictionary / Index T testis: Meaning and Definition of Find definitions for: tes•tis Pronunciation: (tes'tis), [key] — pl. -tes the male gonad or reproductive gland, either of two oval glands located in the scrotum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: testis (Thesaurus) testimony meeting test-market Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language