clay »
A mineral substance made up of small crystals of silica and alumina, that is ductile when moist; the material of pre-fired ceramics.
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miner's canary »
A caged bird kept caged in mines because its demise provided a warning of dangerous levels of toxic gases.
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miner's canary »
Any thing, especially an organism, whose demise or distress provides an early warning of danger.
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miners' canary »
A caged bird kept caged in mines because its demise provided a warning of dangerous levels of toxic gases.
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miners' canary »
Any thing, especially an organism, whose demise or distress provides an early warning of danger.
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