Definition of "alluvia" [alluvia]

• A plural of alluvium. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The geology of the region ranges from the recent river alluvia and Karoo sandstones to the ancient gneiss and paragneiss overlain by the lithosols of the basement complex of the escarpment."
• "Vegetation associations of the alluvia of the Silice Plateau."
• "With the exception of the post-Karoo igneous intrusive formation and the recent thin alluvia along the major river valleys, the strongly consolidated rocks of the Archean Basement Complex and the Karoo system underlie practically all of Swaziland and limit the groundwater development potential of the country."