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tour·ma·line (tur·ma·line)

tourmaline (turmaline)

 
pronunciation:
tur m lihn [or] tur m lin
features:
Word Combinations (noun)
part of speech: noun
definition: a complex silicate mineral containing several elements, most importantly boron and aluminum, used in electronic instruments and, in its colorful and transparent varieties, as a gemstone.
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derivation: tourmalinic (adj.)