any of a group of hormonelike fatty acids found throughout the body, esp. in semen, that affect blood pressure, metabolism, body temperature, and other important body processes
Origin of prostaglandin; from prostate + gland + -in
Any of a group of potent hormonelike substances that are produced in various mammalian tissues, are derived from arachidonic acid, and mediate a wide range of physiological functions, such as control of blood pressure, contraction of smooth muscle, and modulation of inflammation.
Origin of prostaglandinprosta(te) gland (from the mistaken belief that the first prostaglandin discovered was secreted by the prostate) + –in.