Englishfor English speakers
mineral
Noun
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A mineral is a substance in the earth such as calcium, salt, iron, etc.
The rocks in this area are rich in minerals.
Eating nuts will help your body get the minerals it needs.
wool
Noun
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Wool is the hair of a sheep. We often use it to make clothes.
insulation
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noun
the state of being isolated or detached
the insulation of England was preserved by the English Channel
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noun
the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity
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noun
(= insulating material)
a material that reduces or prevents the transmission of heat or sound or electricity