Main entry: furnace lining, refractory
Definition: lining consisting of material with a high melting point; used to line the inside walls of a furnace
Main entry: fractious, recalcitrant, refractory
Definition: stubbornly resistant to authority or control
Usage: a fractious animal that would not submit to the harness; a refractory child
Main entry: refractory
Definition: temporarily unresponsive or not fully responsive to nervous or sexual stimuli
Usage: the refractory period of a muscle fiber
Main entry: refractory, stubborn
Definition: not responding to treatment
Usage: a stubborn infection; a refractory case of acne; stubborn rust stains