capsaicin

n. crystalline chemical compound

Capsaicin (8-methyl-N-vanillyl-6-nonenamide) is the active component of chilli peppers, which are plants belonging to the genus Capsicum. It is an irritant for mammals, including humans, and produces a sensation of burning in any tissue with which it comes into contact. Capsaicin and several related compounds are called capsaicinoids and are produced as a secondary metabolite by chilli peppers, probably as deterrents against herbivores. Pure capsaicin is a hydrophobic, colorless, odorless, crystalline to waxy compound.
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Capsaicin /cap·sa·i·cin/ an alkaloid irritating to the skin and mucous membranes, the active ingredient of capsicum ; used as a topical [more]Capsaicin - Community and Resources

Noun
1. 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
(hypernym) chemical irritant
(substance-holonym) capsicum, pepper, capsicum pepper plant

n. capsaicin, crystalline chemical compound