Home › Words › M › metakaolinmetakaolinmetakaolin · noun — A dehydroxylated form of the clay mineral kaolinite.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom meta- + kaolin.nounA dehydroxylated form of the clay mineral kaolinite.Definitions & examples from Wiktionary (CC BY-SA 3.0).