noun
A somewhat dated or literary term for an oven; in modern Japanese, オーブン is far more common. Still encountered in older texts or traditional contexts.
See also: オーブン
祖母は天火でパンを焼いていた。
My grandmother used to bake bread in an oven.
この古い料理本には天火の使い方が詳しく書いて
This old cookbook explains how to use an oven in detail.