Englishfor English speakers
crucible
Noun
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A crucible is a piece of laboratory equipment that is used to contain chemical compounds when heating them to very high temperatures.
melting
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adjective
(= liquescent)
becoming liquid
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noun
(= thaw, melt, thawing)
the process whereby heat changes something from a solid to a liquid
the power failure caused a refrigerator melt that was a disaster
the thawing of a frozen turkey takes several hours
furnace
Noun
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A furnace is a machine that is used to heat a building.
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A furnace is a place that is very hot.