意味: にゅうとうn. (Kanji=乳糖) milk sugar, lactose, white crystalline substance derived from milk and used to prepare baby foodn. (Kanji=乳頭) nipple, teat, tip of mammary gland of mammalsn. (Kanji=入党) joining a political partyn. (Kanji=入湯) taking a hot bath, bathing at hot springs