D defs.my
Entry 1 sense Webster, 1913

Smectite

· Smec·tite · IPA
01 n. A hydrous silicate of alumina, of a greenish color, which, in certain states of humidity, appears transparent and almost gelatinous.
  1. 1.
    A hydrous silicate of alumina, of a greenish color, which, in certain states of humidity, appears transparent and almost gelatinous.(Min.)