One of the purgatories. It is next to the Mahā Niraya, and is the habitation of needle-mouthed creatures who rip away the skin, flesh, tendons, etc., of the victim and then devour his marrow (M.iii.185; J.vi.8; SNA.ii.481).
Those who insult their parents are born in this purgatory. DhA.iv.34.