Lewis & Short

Īnōpus, i, m. [Ἰνωπός], a fountain and river in the island of Delos, where Latona brought forth Apollo and Diana. It is said to have risen and fallen at the same time with the Nile, and hence was supposed to be connected with it by a subterraneous channel, Plin. 2, 103, 166, § 229; Val. Fl. 5, 105.