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Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
A metamorphic phyllosilicate mineral of the mica group, having the chemical formula K(Fe2+,Mg,Fe3+)8(Si,Al)12(O,OH)27.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: chemistry, geography, geology, mineralogy, natural-sciences, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
Ancient Greek στιλπνός (stilpnós, “glittering”), and μελανός (melanós, “black”).
