Kiefekil \Kie"fe*kil\, n. [Per. keff foam, scum + gil clay, mud.] (Min.) A species of clay; meerschaum. [Also written {keffekil}.] [1913 Webster]
Keffe-kil \Kef"fe-kil\, n. (Min.) See {Kiefekil}. [1913 Webster]