leukotriene

noun Biochemistry.

1. a lipid, C20H30O3, produced by white blood cells in an immune response to antigens, that contributes to allergic asthma and inflammatory reactions.

noun

1. one of a class of products of metabolic conversion of arachidonic acid; the active constituents of slow-reacting substance, responsible for bronchial constriction, contraction of smooth muscle, and inflammatory processes

n.

1. Any of a group of physiologically active substances that function both as mediators of inflammation and as participants in allergic responses.