The Collaborative International Dictionary of English v.0.48:
Testis \Tes"tis\, n.; pl. Testes. [L.] (Anat.) A testicle. [1913 Webster]WordNet (r) 3.0 (2006):
testis n 1: one of the two male reproductive glands that produce spermatozoa and secrete androgens; "she kicked him in the balls and got away" [syn: testis, testicle, orchis, ball, ballock, bollock, nut, egg]