Yama \Ya"ma\, n. [Skr. yama a twin.]

(Hindoo Myth.) The king of the infernal regions, corresponding to the Greek Pluto, and also the judge of departed souls. In later times he is more exclusively considered the dire judge of all, and the tormentor of the wicked. He is represented as of a green color, with red garments, having a crown on his head, his eyes inflamed, and sitting on a buffalo, with a club and noose in his hands.

Source: Webster's Revised Unabridged Dictionary (1913)