Lewis Short
(verb) : inter-fundo, fūdi, fūsum, 3, 2. fundo
* To pour between; pass., to flow between (mostly poet.): pelagus interfunditur oras,Avien. Perieg. 250.— Hence, in-terfūsus, a, um, Part.: interfusum mare,Plin. 3, 8, 14, § 86: Dido maculis trementis interfusa genas, stained with spots (of blood), Verg. A. 4, 644: Styx coërcet (animas),interposed,id. ib. 6, 439: interfusa nitentes Vites aequora Cycladas,Hor. C. 1, 14, 19: oceanus,Plin. 2, 68, 68, § 173: nox,intervening,Stat. Th. 3, 677: opacitas,intervening,Plin. 6, 23, 25, § 93.
Charlton T. Lewis, Charles Short, A Latin Dictionary