|äktə|desə|nōik- noun
Etymology: octadecenoic International Scientific Vocabulary octadecene C 18 H 36 (International Scientific Vocabulary octadec- — from octa- + deca- — + -ene ) + -oic
: any of several unsaturated fatty acids C 17 H 33 COOH some of which (as oleic acid, vaccenic acid) occur in fats and oils