Home › Words › A › alluvialalluvial/əˈluː.vi.əl/alluvial means pertaining to the soil deposited by a stream.alluvial is pronounced /əˈluː.vi.əl/.EtymologyFrom Latin alluvius (“alluvial”), from alluviō (“an overflowing, inundation”), from alluō (“wash against”). By surface analysis, alluvium + -ial.adjPertaining to the soil deposited by a stream.nounA deposition of sediment over a long period of time by a river; an alluvial layer.Alluvial soil; specifically, in Australia, gold-bearing alluvial soil.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.alluvials 91% match — Deposits of sediment formed over a long period of time by rivers; layers of alluvium. vs alluvial →alluviation 80% match — The deposition of alluvium (sediment) by a river. vs alluvial →alluvium 76% match — soil, clay, silt or gravel deposited by flowing water, as it slows, in a river bed, delta, estuary or flood plain vs alluvial →alluvion 73% match — The increase in the area of land due to the deposition of sediment (alluvium) by a river. vs alluvial →alluvially 72% match — In alluvial fashion. vs alluvial →alluviate 72% match — To fill or cover with alluvium. vs alluvial →alluvious 68% match — alluvial vs alluvial →allodapic 63% match — deposited as a sediment from a turbid current vs alluvial →