refractory

(noun, adjective)

adjective

1. not responding to treatment

- a refractory case of acne

Similar word(s): intractable, stubborn

2. temporarily unresponsive or not fully responsive to a process or stimulus

- the refractory period of a muscle fiber

Similar word(s): unresponsive

3. stubbornly resistant to authority or control

- a refractory child

Similar word(s): disobedient, fractious, recalcitrant

noun

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

Definition categories: man–made, liner, lining