单词 | vermiculite |
释义 | Word Frequency 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 Word origin C19: from vermicul(ar) + -ite1 |
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