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Word: refractory
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Meaning:
Adjective:
- biology Incapable of registering a reaction or stimulus.
- medicine Difficult to treat.
- Not affected by great heat.
- Obstinate and unruly; strongly opposed to something.
Source: Wiktionary
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Noun:
- A material or piece of material, such as a brick, that has a very high melting point.
Source: Wiktionary
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