n. A chemical compound found in chilli peppers, which is responsible for their pungent flavor.
the GNU version of the Collaborative International Dictionary of English
n. A colorless crystalline substance extracted from the Capsicum annuum, and giving off vapors of intense acridity.
The Century Dictionary and Cyclopedia
n. The crystalline, active principle (C18H27NO3) of Spanish and Cayenne pepper (Capsicum annuum and C. minimum).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
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
Word Usage
"Well, what happens is that that even when - in experimental models, when they give this capsaicin, which is the active ingredient, chronically, you do become desensitized to it, eventually."