n.
Pronunciation: ˌ s ī -pr ō - ' hep-t ə - ˌ d ē n
Function: noun
Etymology: cy clic + pro pyl + hepta- + piperi dine
Date: 1971
: a histamine and serotonin antagonist C 21 H 21 N used especially in the form of its hydrochloride to treat allergy symptoms and hives