(1)either of two soft fleshy milk-secreting glandular organs on the chest of a woman
(2)女性の胸にある2つの柔らかい肉質の乳を分泌する腺器官
(3)mammary gland of bovids (cows and sheep and goats)
(4)ウシ科（ウシ・ヒツジ・ヤギ）の乳腺