alumina vs. aluminum

alumina

noun

  1. the natural or synthetic oxide of aluminum, Al 2 O 3 , occurring in nature in a pure crystal form as corundum.

aluminum

noun

  1. Chemistry. a silver-white metallic element, light in weight, ductile, malleable, and not readily corroded or tarnished, occurring combined in nature in igneous rock, shale, clay, and most soil: used in alloys and for lightweight utensils, castings, airplane parts, etc. : alum.; : Al; : 26.98; : 13; : 2.70 at 20°C.

adjective

  1. of, relating to, or containing aluminum:

    an aluminum frying pan.