noun
: a steam boiler that has very strong tubes with little water space which are kept nearly red-hot so that the water coming to them in small amounts is flashed into steam and superheated
noun
: a steam boiler that has very strong tubes with little water space which are kept nearly red-hot so that the water coming to them in small amounts is flashed into steam and superheated
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012