peat
Concise Oxford English Dictionary © 2008 Oxford University Press:
peat/piːt/
▶noun partly decomposed vegetable matter forming a deposit on acidic, boggy ground, dried for use in gardening and as fuel.
– derivatives
peaty adjective (peatier, peatiest).
peaty adjective (peatier, peatiest).
– origin ME: from Anglo-Latin peta.
'peat' also found in these Oxford entries:

