An acid present in small amounts in sweat; used with its zinc salt in ointments, or as a powder in the treatment of fungus diseases of the skin, psoriasis, and certain other cutaneous affections. SYN: undecenoic acid.
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un·dec·y·le·nic acid .ən-.des-ə-.len-ik-, -.lēn- n an acid C11H20O2 found in perspiration, obtained commercially from castor oil, and used in the treatment of fungus infections (as ringworm) of the skin
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un·dec·yl·en·ic ac·id (un″des-əl-enґik) [USP] an unsaturated fatty acid used as a topical fungicide, effective against Epidermophyton, Trichophyton, and Microsporum spp.Medical dictionary. 2011.