Any of various herbs of the genus Trifolium in the pea family, having trifoliolate leaves and dense heads of small flowers and including species grown for forage, for erosion control, and as a source of nectar for honeybees.

• 苜蓿，三叶草一种豆科三叶草属的草本植物，长有三小叶，开密簇小花，包括用作饲料的、防止水土流失的及作为蜜蜂蜜源的品种