[ soh-luhm ]
/ ˈsoʊ ləm /
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noun, plural so·la [soh-luh], /ˈsoʊ lə/, so·lums.

the upper part of the soil profile, which is influenced by plant roots; the A horizon and the B horizon.



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Origin of solum

1820–30; <Latin: base, bottom; see sole2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for solum

/ (ˈsəʊləm) /

noun plural -lums or -la (-lə)

the upper layers of the soil profile, affected by climate and vegetation
C19: New Latin from Latin: the ground
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for solum

[ sōləm ]

Plural sola solums

The upper layers of a soil profile in which soil formation occurs. The A and B horizons in an ABC soil are part of the solum.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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