单词 | amphibole |
释义 | Word Frequency amphibole(ˈæmfɪˌbəʊl) noun any of a large group of minerals consisting of the silicates of calcium, iron, magnesium, sodium, and aluminium, usually in the form of long slender dark-coloured crystals. Members of the group, including hornblende, actinolite, and tremolite, are common constituents of igneous rocks Word origin C17: from French, from Greek amphibolos uncertain; so called from the large number of varieties in the group |
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