Definition of sillimanite in English:

sillimanite

Syllabification: sil·li·man·ite
Pronunciation: /ˈsiləməˌnīt
 
/

noun

  • An aluminosilicate mineral typically occurring as fibrous masses, commonly in schist or gneiss.
    More example sentences
    • Muscovite and aluminosilicates are almost entirely absent although, where present, the aluminosilicate is sillimanite.
    • The aluminium silicate minerals andalusite, kyanite, and sillimanite are good examples of this phenomenon of polymorphism.
    • Growth of titanite took place during the metamorphic climax in rocks from the kyanite and sillimanite zones.

Origin

mid 19th century: from the name of Benjamin Silliman (1779–1864), US chemist + -ite1.

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a small amount; a little