Clues for the word "REFRACTORY"

We've had 2 crossword clues used for this word, and seen it 2 times in crosswords. It was last seen in Guardian Quick crossword on October 17, 2009.

Definition of refractory

a. - Obstinate in disobedience; contumacious; stubborn; unmanageable; as, a refractory child; a refractory beast.
a. - Resisting ordinary treatment; difficult of fusion, reduction, or the like; -- said especially of metals and the like, which do not readily yield to heat, or to the hammer; as, a refractory ore.
n. - A refractory person.
n. - Refractoriness.
n. - OPottery) A piece of ware covered with a vaporable flux and placed in a kiln, to communicate a glaze to the other articles.