noun ·4 syllables ·Rare ·Advanced level

Definitions

Noun

1. 1
   Aluminum oxide, especially when used in mining, material sciences or ceramics, a refractory solid compound. countable, uncountable

   "The apocrenates of iron and manganese are slightly soluble; those of lime, magnesia and alumina are insoluble."

2. 2
   any of various forms of aluminum oxide occurring naturally as corundum wordnet

Synonyms

All synonyms

aluminium iii oxidealuminium oxidealuminum oxide

Example

More examples

"It has high percentage of silica and alumina."

Etymology

From the combining form of Latin alumen + -a.

Related phrases

activated aluminaaluminium oxidematerial sciences

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.