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re·frac·to·ry (rĭ-frăk'tə-rē)
adj.
  1. Obstinately resistant to authority or control. See synonyms at unruly.
  2. Difficult to melt or work; resistant to heat: a refractory material such as silica.
  3. Resistant to treatment: a refractory case of acne.
n., pl., -ries.
  1. One that is refractory.
  2. Material that has a high melting point.

[Alteration (influenced by adjectives in -ORY) of obsolete refractary, from Latin refrāctārius, from refrāctus, past participle of refringere, to break up. See refract.]

refractorily re·frac'to·ri·ly adv.
refractoriness re·frac'to·ri·ness n.



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