睾丸激素 gāowánjīsù testosterone Origin Definitions Defs Strokes Stroke Words Sentences Sents 睾丸 睪丸 gāowán noun testicle A male reproductive organ in humans and certain animals that produces sperm and secretes male hormones.激素 jīsù noun hormone hormone; a substance produced in an organism that regulates physiological activities such as metabolism and growth