alumina

Definitions


[əˈl(j)uːmɪnə], (Noun)

Definitions:
- a white solid that is a major constituent of many rocks, especially clays, and is found crystallized as corundum, sapphire, and other minerals


Phrases:

Origin:
late 18th century: from Latin alumen (see alum), on the pattern of words such as magnesia




definition by Oxford Dictionaries