Definition of leucite in US English:



  • A gray or white potassium aluminosilicate, typically found in alkali volcanic rocks.

    • ‘Familiar examples include nepheline, leucite, and members of the sodalite and cancrinite groups.’
    • ‘Geologic observations of this region were recorded as early as 1869 by the Hayden Survey, and by 1874 Endlich had reported leucite (later correctly identified as analcime) from Table Mountain.’
    • ‘Additionally, lamproites may contain leucite, richterite, sanidine, and occasionally nepheline, whereas kimberlites do not.’
    • ‘Early reports of leucite from this locality were shown to be an erroneous identification of analcime.’
    • ‘The three commonest feldspathoids are leucite, nepheline, and sodalite.’


Late 18th century: from Greek leukos ‘white’ + -ite.