Refractories
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Refractoriness(n.)
- The quality or condition of being refractory.
Refractory(a.)
- Obstinate in disobedience; contumacious; stubborn; unmanageable; as, a refractory child; a refractory beast.
Refractory(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.