open-hearth

(not comparable)Describing a reverberatory furnace used to make steel, usually in mass-produced quantities.

a then-new steel mill with three large open-hearth furnaces

(not comparable)Designating the steel so produced.

(not comparable)Describing an open hearth in the home, especially in premodern centuries when such hearths were more common.

the little tricks of open-hearth cooking that she had nearly forgotten after years behind a coal range

of or relating to or produced by the open-hearth process