| the offspring of a zebra and a donkey. |
| a gadget; dingus; thingumbob. |
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. alluvial adjective |
alluvium
material deposited by rivers. It is usually most extensively developed in the lower part of the course of a river, forming floodplains and deltas, but may be deposited at any point where the river overflows its banks or where the velocity of a river is checked-for example, where it runs into a lake
Learn more about alluvium with a free trial on Britannica.com.