arachidonic acid

noun Biochemistry.

1. an essential fatty acid, C20H32O2, found in the lipids of most tissues, that is a precursor in the synthesis of prostaglandins, prostacyclins, and related effectors.

noun

1. a fatty acid occurring in animal cells: the metabolic precursor of several groups of biologically active substances, including prostaglandins

n.

1. An unsaturated fatty acid found in animal fats that is essential in human nutrition and is a precursor in the biosynthesis of some prostaglandins.