Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Fluvial \Flu"vi*al\, a. [L. fluvialis, from fluvius river, fr. fluere to flow: cf.F. fluvial. See Fluent.] Belonging to rivers; growing or living in streams or ponds; as, a fluvial plant.
Douglas Harper's Etymology Dictionary
"pertaining to a river," late 14c., from Latin fluvialis "of a river," from fluvius "a river, stream, running water," related to fluere "to flow" (see flow (v.)).
a. Of, pertaining to, inhabiting, or produced by the action of a river or stream
adj. of or relating to or happening in a river; "fluvial deposits"
Usage examples of "fluvial".
Now she pondered the significance of color changes, fluvial features, apparent layers of sediment.