Urad, also referred to as urad dal, udad dal, urd bean, urd, urid, black matpe bean, black gram, black lentil or white lentil, is a bean grown in southern Asia. It is largely used to make dal from the whole or split, dehusked seeds.

Black gram originated in India where it has been in cultivation from ancient times and is one of the most highly prized pulses of India. It has also been introduced to other tropical areas mainly by Indian immigrants.

It is an erect, sub-erect or trailing, densely hairy annual herb. The tap root produces a branched root system with smooth, rounded nodules. The pods are narrow, cylindrical and up to 6 cm long.

The bean is boiled and eaten whole or after splitting into dal; prepared like this it has an unusual mucilaginous texture. Ground into flour or paste, it is also extensively used in culinary preparation like dosa, idli, vada, and papad. When used this way, the white lentils are usually used. The white lentils are called "ulundhu" in Tamil.

It is very nutritious and is recommended for diabetics, as are other pulses. It is very popular in Punjabi cuisine of India and Pakistan where it is known as "maash".