peat /piːt/ noun
[Date: 1300-1400; Language: Medieval Latin; Origin: peta, probably from a Celtic language]
[uncountable] a black substance formed from decaying plants under the surface of the ground in some areas, which can be burned as a fuel, or mixed with soil to help plants grow well
—peaty adjective:
a rich, peaty soil

[TahlilGaran] Dictionary of Contemporary English ▲