aluminum oxide

English Thesaurus

1. any of various forms of aluminum oxide occurring naturally as corundum (noun.substance)

hypernym	:	corundom, corundum,
definition	:	very hard mineral used as an abrasive (noun.substance)

hyponym	:	alundum,
definition	:	a substance made of fused alumina (noun.substance)

substance meronym	:	furnace lining, refractory,
definition	:	lining consisting of material with a high melting point; used to line the inside walls of a furnace (noun.artifact)