alumina
alu.mi.na \*-'lu:-m*-n*\ n [NL, fr. L alumin-, alumen alum] : aluminum oxide Al2O3 occurring native as corundum and in hyd rated forms (as in bauxite)
Webster's English Dictionary Webster's English Dictionaryalu.mi.na \*-'lu:-m*-n*\ n [NL, fr. L alumin-, alumen alum] : aluminum oxide Al2O3 occurring native as corundum and in hyd rated forms (as in bauxite)