Function: noun
Date: 1937
: any of a group of hydrous silicates of aluminum and sometimes other metals formed chiefly in weathering processes and occurring especially in clay and shale
Function: noun
Date: 1937
: any of a group of hydrous silicates of aluminum and sometimes other metals formed chiefly in weathering processes and occurring especially in clay and shale
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012