- The definition of humus is partially decomposed organic matter.
Partially decomposed plant matter in the soil is an example of humus.
Origin: L, earth, ground, soil from Indo-European an unverified form ĝhom-: see homo
Used by arrangement with John Wiley & Sons, Inc.
Origin: Latin, soil; see dhghem- in Indo-European roots.
humus - Science Definition
Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.