1. refractory - noun
· lining consisting of material with a high melting point; used to line the inside walls of a furnace
2. refractory - adjective
· not responding to treatment; "a stubborn infection"; "a refractory case of acne"; "stubborn rust stains"
3. refractory - adjective
· temporarily unresponsive or not fully responsive to a process or stimulus; "the refractory period of a muscle fiber"
4. refractory - adjective
· stubbornly resistant to authority or control; "a fractious animal that would not submit to the harness"; "a refractory child"
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