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octadecanoic acid

American  
[ok-tuh-dek-uh-noh-ik, ok-] / ˈɒk təˌdɛk əˈnoʊ ɪk, ˌɒk- /

noun

Chemistry.
  1. stearic acid.


Etymology

Origin of octadecanoic acid

octa- + decane + -o- + -ic