绿豆（学名：Vigna radiata，英语：mung bean）是一种豆科、蝶形花亚科豇豆属植物。

绿豆Vigna radiata

豆荚熟透，开荚

一年生草本；植物高度20-150厘米。茎截面圆形，幼茎紫色或绿色，成熟茎灰黄或褐色。主根不发达，侧根多而细长，根上有根瘤。叶卵圆或阔卵圆形，子叶出土后枯死，两片单叶上生三出复叶，叶片长6-12厘米，宽5-10厘米。茎分支多，根据形态可分为直立丛生型、半蔓生型、蔓生型。总状花序，花黄色，生于叶腋和顶端，每花梗上有10-25朵花，自花授粉。果实为细长圆筒形或扁圆筒形的荚果，一般每株30-50个。荚果长5-10厘米，宽0.4-0.6厘米，内有12-14粒隔膜隔开的种子，种子有绿、黄、褐、蓝等颜色，可呈圆柱形或球形。

The mung bean (Vigna radiata), alternatively known as the moong bean, green gram, is a plant species in the legume family. Native to South America, the mung bean is mainly cultivated today in India, China, and Southeast Asia. It is used as an ingredient in both savory and sweet dishes.