horizontal hormone
n
(a) substance produced within the body of an animal and carried by the blood to an organ which it stimulates to assist growth, etc; similar substance produced by a plant and transported in the sap 激素; 荷尔蒙
[attrib 作定语]
hormone deficiency, imbalance 激素缺乏、 失调.
(b) synthetic substance that has a similar effect 合成激素.