ˌarəˈkidik- noun
also arach·ic acid əˈrakik-
Etymology: International Scientific Vocabulary arachid- or arach- (from New Latin Arachid-, Arachis ) + -ic
: a white crystalline saturated fatty acid CH 3 (CH 2 ) 18 COOH found in the form of esters especially in vegetable fats and oils (as peanut oil) — called also eicosanoic acid