fluvial

adj

1. (not-comparable)Of, pertaining to, inhabiting, or produced by the action of a river or stream.

   “...that's where I remember the vertigo, surrendering to that vertigo when I came inside you, a liberating surrender, a total bravery, and may forces unknown to me decide, impulses, fluvial wills, cells, creatures, the fauna of the mystery, an orange dinosaur in a toy store.”