TOURMALINE
\tˈʊ͡əməlˌa͡ɪn], \tˈʊəməlˌaɪn], \t_ˈʊə_m_ə_l_ˌaɪ_n]\
Definitions of TOURMALINE
- 2006 - WordNet 3.0
- 2011 - English Dictionary Database
- 1871 - The Cabinet Dictionary of the English Language
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a mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium; it is usually black but occurs in transparent colored forms that are used as gemstones
By Princeton University
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