gland [glænd]

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n.腺体，(机)密封压盖，填料盖

an organ of the body or of a plant which secretes (= produces ) liquid chemicals that have various purposes

This is a snake's poison gland. 这就是蛇的毒腺。
Her mother has an underactive adrenal gland. 她的母亲肾上腺机能不全。