Lewis Short
inter-lābor, lapsus sum, 3
* V. dep. n. and a., to fall, slip, slide, glide, or flow between (poet.): per has stellis interlabentibus umbras,Stat. Th. 2, 649: (in tmesi), inter enim labentur aquae,Verg. G. 2, 349; Sil. 6, 18.—With acc.: fluvius lucos,Amm. 22, 8, 17.
Charlton T. Lewis, Charles Short, A Latin Dictionary