re•frac•to•ryPronunciation: (ri-frak'tu-rē), [key]
—adj., n., pl. -ries.
hard or impossible to manage; stubbornly disobedient: a refractory child.
resisting ordinary methods of treatment.
difficult to fuse, reduce, or work, as an ore or metal.
a material having the ability to retain its physical shape and chemical identity when subjected to high temperatures.
bricks of various shapes used in lining furnaces.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.