noun ダウンロード 🔗共有 睾丸 The male sex and endocrine gland, found in some types of animals, that produces sperm and male sex hormones, including the steroid testosterone. Examples : "The veterinarian examined the dog's testicles to check for any signs of swelling or abnormality. " 獣医は、腫れや異常の兆候がないか確認するために、犬の睾丸を検査しました。 anatomy organ sex body physiology biology medicine science animal human AIとチャット語彙ゲーム読解練習