Urad dal, scientifically known as Vigna mungo, is a member of the Fabaceae family. It is an annual legume crop cultivated primarily in South Asia. There are different varieties of urad dal, including whole urad dal, split urad dal (with skin), split urad dal (without skin), and urad dal flour. Whole urad dal is the whole, unsplit form with the black skin intact. Split urad dal with skin is obtained by splitting the whole urad dal but keeping the black skin on. Split urad dal without skin is obtained by removing the black skin from the split urad dal. Urad dal flour is made by grinding urad dal into a fine powder.