pot-oven
/ˈpɒtˌʌvn/noun
1A kiln in which pottery is fired. Now historical.
2 British regional (chiefly Irish English and Manx English ). A heated piece of metal, covered by a pot, for slow-cooking or keeping warm bread, cakes, etc. Now rare (chiefly historical ).
Origin
Early 18th century; earliest use found in Ralph Thoresby (1658–1725), antiquary and topographer. From pot + oven.