anorthoclase

noun

an·​or·​tho·​clase

əˈnȯrthəˌklās,

-āz

plural -s

: a feldspar of chiefly sodium potassium aluminum silicate that is closely related to orthoclase but triclinic

Word History

Etymology

International Scientific Vocabulary an- + orthoclase; originally formed as German anorthoklase

First Known Use

1888, in the meaning defined above

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