|1.||of or relating to alluvium|
|2.||another name for alluvium|
|3.||(Austral), (NZ) alluvium containing any heavy mineral, esp gold|
|alluvium (ə-l'vē-əm) Pronunciation Key
Plural alluviums or alluvia
Sand, silt, clay, gravel, or other matter deposited by flowing water, as in a riverbed, floodplain, delta, or alluvial fan. Alluvium is generally considered a young deposit in terms of geologic time.