open hearth

== English == === Alternative forms === open-hearth (hyphenated compound attributive form) === Noun === open hearth (plural open hearths) An open hearth furnace (open-hearth furnace). A home hearth comprising a hearthstone alone, as opposed to one comprising a hearthstone and fireplace or oven. === Adjective === open hearth (not comparable) Alternative form of open-hearth (open compound attributive form)