refractory

American  

[ri-frak-tuh-ree] / rɪˈfræk tə ri /

adjective

1. hard or impossible to manage; stubbornly disobedient.

   a refractory child.

   Synonyms:

   ungovernable, recalcitrant, disobedient, intractable, headstrong, mulish, perverse, obstinate

   Antonyms:

   tractable, obedient

2. resisting ordinary methods of treatment.

3. difficult to fuse, reduce, or work, as an ore or metal.

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noun

plural

refractories

1. a material having the ability to retain its physical shape and chemical identity when subjected to high temperatures.

2. refractories, bricks of various shapes used in lining furnaces.

refractory British  

/ rɪˈfræktərɪ /

adjective

1. unmanageable or obstinate

2. med not responding to treatment

3. (of a material) able to withstand high temperatures without fusion or decomposition

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noun

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

refractory Scientific  

/ rĭ-frăk′tə-rē /

1. 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.

2. Resistant to heat.

3. Of or relating to a refractory period.

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Related Words

See unruly.

Other Word Forms

• refractorily adverb
• refractoriness noun
• unrefractory adjective

Etymology

Origin of refractory

First recorded in 1600–10; variant of refractary (by analogy with adjectives in -ory ¹ ), from Latin refrāctārius “stubborn, obstinate,” equivalent to refrāct(us) ( refract ) + -ārius -ary

Example Sentences

"The prospect of changing the alloy and including other refractory metals to enhance the composite for nuclear applications is particularly exciting."

From Science Daily

He said the medical cause of Benn's death was "refractory cardiogenic shock due to taxane alkaloid poisoning, following ingestion of yew tree berries and leaves".

From BBC

U.S. and European companies have been recently investing in developing synthetic graphite as demand from the EV sector is surging for this soft form of carbon, which until recently was mainly used for steelmaking refractories.

From Reuters

In order to collect the data, researchers turned to a group of patients who have refractory epilepsy, currently untreatable by medication.

From Science Daily

These unique landscapes would inspire the “Sacred Places” series, where watery glaze shines in contrast to stony, hand-molded castable refractory, which peaks like an island rising from the sea.

From Los Angeles Times