refractory

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• May 20. 2013 from wordnet.princeton.edu

  refractory — noun — english

  lining consisting of material with a high melting point; used to line the inside walls of a furnace

• March 31. 2016 from wordnet.princeton.edu

  refractory — adjective — english

  not responding to treatment; "a stubborn infection"; "a refractory case of acne"; "stubborn rust stains"

• March 31. 2016 from wordnet.princeton.edu

  refractory — adjective — english

  temporarily unresponsive or not fully responsive to a process or stimulus; "the refractory period of a muscle fiber"

• March 31. 2016 from wordnet.princeton.edu

  refractory — adjective — english

  stubbornly resistant to authority or control; "a fractious animal that would not submit to the harness"; "a refractory child"