- noting, pertaining to, or produced by the open-hearth process.
Origin of open-hearth
First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for open-hearth
Open-hearth steel is an important manufacture in Birmingham.Commercial Geography
Jacques W. Redway
All these parts are made of the finest quality of open-hearth steel.The Wonder Book of Knowledge
The Corporation altogether has 335 open-hearth furnaces and 38 converters.
All the newer steel plants are equipped with open-hearth furnaces.
They may be either Bessemer, open-hearth, or crucible steel.