sillimanite
[ sil-uh-muh-nahyt ]
/ ˈsɪl ə məˌnaɪt /
noun
a mineral, aluminum silicate, Al2SiO5, occurring in the form of long, slender, and often fibrous crystals.
Words nearby sillimanite
sillanpää, sillcock, siller, sillery, silliman, sillimanite, sillitoe, sills, silly, silly billy, silly putty
Also called fibrolite.
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for sillimanite
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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Science 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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