Humus

n.

1.

That portion of the soil formed by the decomposition of animal or vegetable matter. It is a valuable constituent of soils.

Noun	1.	humus - partially decomposed organic matter; the organic component of soil
	2.	humus - a thick spread made from mashed chickpeas, tahini, lemon juice and garlic; used especially as a dip for pita; originated in the Middle East Synonyms: hommos, hoummos, hummus, humous

A horizon, A-horizon, dirt, soil