sillimanite
[ sil-uh-muh-nahyt ]
/ ˈsɪl ə məˌnaɪt /
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noun
a mineral, aluminum silicate, Al2SiO5, occurring in the form of long, slender, and often fibrous crystals.
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Mississippi’s nickname comes from the magnificent trees that grow there. What is it?
Also called fibrolite.
Words nearby sillimanite
Sillanpää, sillcock, siller, Sillery, Silliman, sillimanite, Sillitoe, Sills, silly, silly billy, Silly Putty
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for sillimanite
In mica-gneisses sillimanite, kyanite, andalusite and garnet may occur.
Sillimanite usually forms exceedingly minute needles embedded in quartz.
British Dictionary definitions for sillimanite
sillimanite
/ (ˈsɪlɪməˌnaɪt) /
noun
a white, brown, or green fibrous mineral that consists of aluminium silicate in orthorhombic crystalline form and occurs in metamorphic rocks. Formula: Al 2 SiO 5
Word Origin for sillimanite
C19: named after Benjamin Silliman (1779–1864), US chemist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Scientific definitions for sillimanite
sillimanite
[ sĭl′ə-mə-nīt′ ]
A usually white, pale-green or brown orthorhombic mineral occurring as long, slender, fibrous crystals in metamorphic rocks. It is a polymorph of andalusite and kyanite, but can form at higher temperatures than either of these. Chemical formula: Al2SiO5.
The American Heritage® Science Dictionary
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