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Definitions of refractory
  1. adjective
    not responding to treatment
    "a refractory case of acne"

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  2. adjective
    stubbornly resistant to authority or control
    "a refractory child"
  3. noun
    lining consisting of material with a high melting point; used to line the inside walls of a furnace

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

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