refractory

adj 1: resistant to authority or control; "as refractory as a mule"

2: (med) not responding to treatment; "a stubborn infection";

"a refractory case of acne" [syn: {stubborn}]

3: marked by stubborn resistance to and defiant of authority or

guidance; "a recalcitrant teenager"; "everything revolves

around a refractory individual genius" [syn: {recalcitrant}]

4: stubbornly resistant to authority or control; "a fractious

animal that would not submit to the harness"; "a

refractory child" [syn: {fractious}]

n : material with a high melting point that is used to line the

inside walls of a furnace [syn: {furnace lining}]