Lewis Short
(verb) : inter-flŭo, fluxi, 3, and
* A. (in tmesi, Lucr. 4, 227), to flow between (rare but class.): quantum interfluit fretum,Liv. 41, 23, 16: angusto freto interfluente,Plin. 3, 5, 11, § 76.— With acc.: fretum, quod Naupactum et Ratras interfluit,Liv. 27, 29; cf.: flumen Visurgis Romanos interfluebat,Tac. A. 2, 9.— With dat.: interfluens urbi Tiberinus,Flor. 1, 4, 2; Sen. Ben. 6, 7, 3; Liv. 28, 23, 4.— Pass.: insulae interfluuntur (supply mari), App. de Mundo, p. 69 (but interfuissent is the true reading,Cic. de Sen. 6, 16).
Charlton T. Lewis, Charles Short, A Latin Dictionary