inter-mundĭa, ōrum, n. plur. [mundus],
spaces between the worlds , in which, acc. to Epicurus, the gods reside, Cic. Fin. 2, 23, 75; cf. id. Div. 2, 17, 40: id. N. D. 1, 8, 18.
intermundia ōrum, n plur.inter+mundus, spaces between worlds . ...
An Elementary Latin Dictionary