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vermiculite
[ ver-mik-yuh-lahyt ]
noun
- any of a group of platy minerals, hydrous silicates of aluminum, magnesium, and iron, that expand markedly on being heated: used in the expanded state for heat insulation and as a plant growth medium.
vermiculite
/ vɜːˈmɪkjʊˌlaɪt /
noun
- any of a group of micaceous minerals consisting mainly of hydrated silicate of magnesium, aluminium, and iron: on heating they expand and exfoliate and in this form are used in heat and sound insulation, fireproofing, and as a bedding medium for young plants
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Word History and Origins
Origin of vermiculite1
An Americanism dating back to 1815–25; vermicul(ar) + -ite 1
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Word History and Origins
Origin of vermiculite1
C19: from vermicul ( ar ) + -ite 1
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