tourmaline是什么意思_tourmaline怎么读_音标'tʊməlɪn

tourmapne是什么意思音标:英 ['tʊməlɪn]美 ['tʊrməlɪn]

[化] 电气石

n. a mineral that is a complex borosipcate and hydroxide of aluminum containing iron and magnesium and calcium and pthium and sodium; it is usually black but occurs in transparent colored forms that are used as gemstones