humus

Definitions

The organic component of soil, formed by the decomposition of leaves and other plant material by soil microorganisms.

A dark-brown or black organic substance made up of decayed vegetable or animal matter that provides nutrients for plants.

Examples

The gardener added a thick layer of humus to the soil to help the vegetables grow.

Rich in organic matter, the dark humus provided essential nutrients to the forest floor.

Synonyms

compost organic matter loam mold soil earth humic substance

Antonyms

inorganic matter sterile soil sand rock mineral substrate synthetic material