refractory

[ ri-frak-tuh-ree ]
/ rɪˈfræk tə ri /

adjective

hard or impossible to manage; stubbornly disobedient: a refractory child.
resisting ordinary methods of treatment.
difficult to fuse, reduce, or work, as an ore or metal.

noun, plural re·frac·to·ries.

a material having the ability to retain its physical shape and chemical identity when subjected to high temperatures.
refractories, bricks of various shapes used in lining furnaces.

Origin of refractory

1600–10; variant of refractary (by analogy with adjectives in -ory1) < Latin refrāctārius stubborn, obstinate, equivalent to refrāct(us) (see refract) + -ārius -ary

OTHER WORDS FROM refractory

re·frac·to·ri·ly, adverb re·frac·to·ri·ness, noun un·re·frac·to·ry, adjective

Example sentences from the Web for refractory

British Dictionary definitions for refractory

refractory
/ (rɪˈfræktərɪ) /

adjective

unmanageable or obstinate
med not responding to treatment
(of a material) able to withstand high temperatures without fusion or decomposition

noun plural -ries

a material, such as fireclay or alumina, that is able to withstand high temperatures: used to line furnaces, kilns, etc

Derived forms of refractory

refractorily, adverb refractoriness, noun

Word Origin for refractory

C17: variant of obsolete refractary; see refract

Medical definitions for refractory

refractory
[ rĭ-frăktə-rē ]

adj.

Resistant to treatment, as a disease.
Unresponsive to stimuli, as a muscle or nerve fiber.

Scientific definitions for refractory

refractory
[ rĭ-frăktə-rē ]

Having a high melting point. Ceramics that are made from clay and minerals are often refractory, as are metal oxides and carbides. Refractory materials are often used as liners in furnaces.
Resistant to heat.
Of or relating to a refractory period.