单词 | colemanite |
释义 | Word Frequency colemanite(ˈkəʊlməˌnaɪt) noun a colourless or white glassy mineral consisting of hydrated calcium borate in monoclinic crystalline form. It occurs with and is a source of borax. Formula: Ca2B6O11.5H2O Word origin C19: named after William T. Coleman (1824–93), American pioneer, owner of the mine in which it was discovered |
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