̷ ̷ˌ ̷ ̷ ̷ ̷ˈōik- noun
Etymology: New Latin Senecio + English -ic
: a crystalline unsaturated fatty acid (CH 3 ) 2 C . CHCOOH found especially in rhizomes of various plants of the genus Ligularia but usually made from isovaleric acid by bromination and treatment with base; β-methyl-crotonic acid or β, β-dimethyl-acrylic acid