Definition: Meaning of, tourmaline in English to English dictionary.
Pronunciation:/ ˈtʊəməlɪn;ˈtʊəməliːn /
noun
synonym
antonym
Word Forms:
Singular
Plural
tourmaline
tourmalines
a mineral that is a complex borosilicate and hydroxide of aluminium containing iron and magnesium and calcium and lithium and sodium; it is usually black but occurs in transparent coloured forms that are used as gemstones