A mass of darkness (the form of a cosmological structure of very great size in) formed by the natural transformations of the water-bodied beings and Pudgalas (material clusters);
it exists in both the Tirijakloka (middle universe) and the Urdhvaloka (upper universe).
tamaskāyasya ca stibnkākārāpkāyikajīvātmakatvāt.
(Bhaga 6.72 Vṛ Pa 539)
tamukkāe ṇaṃ......jīvapariṇāme vi poggalapariṇāme vi.
(Bhaga 6.87)