辣椒辣素
Capsaicin \Cap*sa"i*cin\, n. [From {Capsicum}.] (Chem.) A colorless crystalline substance extracted from the {Capsicum annuum}, and giving off vapors of intense acridity.
capsaicin n : colorless pungent crystalline compound derived from capsicum; source of the hotness of hot peppers of the genus Capsicum such as chili and cayenne and jalapeno