| undecylenic | <chemistry> Pertaining to, or designating, an acid C11H20O2, homologous with acrylic acid, and obtained as a white crystalline substance by the distillation of castor oil. Source: Websters Dictionary (01 Mar 1998) |
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| undecylenic acid | CH2CH(CH2)8COOH;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. Synonym: undecenoic acid. (05 Mar 2000) |