tourmalinen.
英 'tʊəməlɪn; -liːn | 美 'tʊəməlɪn
中文n. [矿物] 电气石
词根词源
tourmaline (n.)complete silicate of aluminum and boron, 1759, from French or German, ultimately from Sinhalese toramalli, a general name for cornelian.
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