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vermiculite

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noun ver·mic·u·lite \(ˌ)vər-ˈmi-kyə-ˌlīt\

Definition of vermiculite

  1. :  any of various micaceous minerals that are hydrous silicates resulting usually from expansion of the granules of mica at high temperatures to give a lightweight highly water-absorbent material



Origin of vermiculite

Latin vermiculus little worm


First Known Use: 1824


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