单词 | vermiculite |
释义 | vermiculite/vəˈmɪkjʊlʌɪt![]() noun [mass noun] A yellow or brown mineral found as an alteration product of mica and other minerals, used for insulation or as a moisture-retentive medium for growing plants.Clay minerals are mainly illite and chlorite, with only traces of smectite, vermiculite and kaolinite....
OriginEarly 19th century: from Latin vermiculari 'be full of worms' (because on expansion due to heat, it shoots out forms resembling small worms) + -ite1. |
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