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A pungent alkaloid, C18H27NO3, derived from certain capsicums that is a strong irritant to skin and mucous membranes and is used in some topical pain relievers and in pepper sprays.

[Alteration (perhaps influenced by Latin capsa, box) of earlier capsicin : capsic(um) + -in.]


(Biochemistry) a colourless crystalline bitter alkaloid found in capsicums and used as a flavouring in vinegar and pickles. Formula: C18H27O3N
[C19 capsicine, from capsicum + -ine2; modern form refashioned from Latin capsa box, case + -in]


(kæpˈseɪ ə sɪn)

a colorless, crystalline, bitter compound, C18H27NO3, present in capsicum.
[1885–90; earlier capsicine= capsic (um) + -ine2]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.capsaicin - 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
capsicum, capsicum pepper plant, pepper - any of various tropical plants of the genus Capsicum bearing peppers
chemical irritant - a substance producing irritation


n capsaicina
References in periodicals archive ?
Dr Dana Al-Hamwi, GP and Clinical Dietician at Sama Medical Centre, says chillies have a compound called capsacin which temporarily increases your metabolic rate.
Also, topical capsacin (red hot chilli peppers) can be beneficial as a rubbing cream - although some people find the burning sensation too uncomfortable.
John's wort Increased photosensitivity (Hypericum perforatum) Potentiation of sedative effect Valerian Increased CNS depression (Valeriana officinalis) Yohimbe Increased analgesia (Pausinystalia yohimbe) Herbal supplements Possible mechanisms of (Scientific names) interactions Aloe latex Increased loss of potassium (Aloe vera, Aloe ferox) Decreased gastrointestinal transit time and absorption of drugs Bromelain Supplement has (enzyme from Pineapple, anticoagulant activity Ananas comasus) Increased gastrointestinal absorption of drugs Cascara sagrada Increased potassium loss (Rhamnus purshiana) Cayenne/chile pepper Capsacin in herb inhibits syn- (Capsicum spp.