Smectite

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Smectite \Smec"tite\, n. [G. smectit, fr. Gr. ????? a kind of
     fuller's earth, fr. ????? to wipe off.] (Min.)
     A hydrous silicate of alumina, of a greenish color, which, in
     certain states of humidity, appears transparent and almost
     gelatinous.
     [1913 Webster]