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undecylenic acid

American  
[uhn-des-uh-len-ik, uhn-] / ˈʌn dɛs əˈlɛn ɪk, ˌʌn- /

noun

Chemistry.
  1. a light-colored liquid with a fruity odor, C 11 H 21 O 2 , soluble in alcohol and ether: used in perfumes, flavors, plastics, and medicine.


Etymology

Origin of undecylenic acid

1905–10; undec(a) - eleven (as in undecagon ) + -yl + -ene + -ic