Dictionary.net

Steel made directly from cast iron, by burning out a portion of the carbon and other impurities that the latter contains, through the agency of a blast of air which is forced through the molten metal; -- so called from Sir Henry Bessemer, an English engineer, the inventor of the process.

Steel made directly from cast iron, by burning out a portion of the carbon and other impurities that the latter contains, through the agency of a blast of air which is forced through the molten metal; -- so called from Sir Henry Bessemer, an English engineer, the inventor of the process.

Steel made by passing a blast of air through molten cast iron, so as to get rid of the carbon and silicon, and then adding enough pure cast iron to supply carbon for the formation of steel. (Named after the inventor.)