noun ダウンロード 🔗共有 精液 A sticky, milky fluid produced in male reproductive organs that contains the reproductive cells. Examples : "During artificial insemination, the veterinarian carefully collects the bull's semen for breeding purposes. " 人工授精の際、獣医は繁殖目的で雄牛の精液を慎重に採取します。 body organ physiology sex biology anatomy medicine human AIとチャット語彙ゲーム読解練習