Alveus

·noun The channel of a river.

alveus
alvĕus, i, m. (alveum, n., ap. Paul. ex Fest. s. v. naustibulum, p. 169 Müll.) [alvus], a hollow, a ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
alveus
alveus ī, m alvus, a hollow, cavity, excavation : vitiosae ilicis, V.—Esp., of a river, a bed, ch...

An Elementary Latin Dictionary