/gib"zuyt/ , n.
a mineral, hydrated aluminum oxide, Al 2 O 3 3H 2 O, occurring in whitish or grayish crystals and masses: an important constituent of bauxite ore.
Also called hydrargillite .
[ 1815-25; named after George Gibbs (d. 1833), American mineralogist; see -ITE 1 ]