Any of a group of hormonelike substances produced in various mammalian tissues that are derived from amino acids and mediate a wide range of physiological functions, such as metabolism, smooth muscle activity, and nerve transmission.

• 前列腺素任一种产生于哺乳动物组织中的一组类似荷尔蒙的物质，由氨基酸生成，调节着一个很大范围的生理活动及神经传送