Pyrophyllite definitions

pī'rō-fĭl'īt', pī-rŏf'ə-līt'
A silvery white or pale green aluminum silicate mineral, Al2 Si4 O10 (OH)2 , occurring naturally in soft compact masses.
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A very soft, greasy, monoclinic mineral, AlSi2O5(OH), that is similar to talc in structure, used as a lubricant and in making rubber, soap, etc.; hydrous aluminum silicate.
noun
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(mineralogy) A soft, pale aluminosilicate mineral, somewhat resembling talc.
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