mara
Ma"ra, n. Etym: [Skr. mara.] (Hind. Myth.) Defn: The principal or ruling evil spirit. E. Arnold. Ma"ra, n. Etym: [Icel. mara nightmare, an ogress. See Nightmare.] (Norse Myth.) Defn: A female demon who torments people in sleep by crouching on their chests or stomachs, or by causing terrifying visions. Ma"ra, n. (Zoöl.) Defn: The Patagonian cavy (Dolichotis Patagonicus.)