Vigna mungo, also known as black gram, urad bean, urid bean, matimah, matikolai, mash kalai, maas/kalo daal, uzhunnu parippu, ulundu parippu, minapa pappu, uddu, or black matpe, is a bean grown in South Asia. Like its relative, the mung bean, it has been reclassified from the Phaseolus to the Vigna genus. The product sold as black lentil is usually the whole urad bean, whereas the split bean is called white lentil. It should not be confused with the much smaller true black lentil.

The mung bean, alternatively known as green gram, mungo bean or mongo bean, is a plant species in the legume family. The mung bean is mainly cultivated in East, Southeast and South Asia. It is used as an ingredient in both savoury and sweet dishes.