alundum: meaning, definition, pronunciation and examples
RareTechnical/Industrial
Quick answer
What does “alundum” mean?
A synthetic fused alumina (Al₂O₃) used primarily as an abrasive or refractory material.
Audio
Pronunciation
Definition
Meaning and Definition
A synthetic fused alumina (Al₂O₃) used primarily as an abrasive or refractory material.
A trademarked name for various forms of aluminium oxide produced by fusing bauxite, used industrially in grinding wheels, sandpaper, refractories, and as a polishing compound.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Spelling is consistent.
Connotations
None beyond its technical industrial context.
Frequency
Equally rare in both dialects, confined to materials science, metallurgy, and manufacturing contexts.
Grammar
How to Use “alundum” in a Sentence
N of alundumalundum N (as modifier)V (e.g., polish, grind) with alundumVocabulary
Collocations
Examples
Examples of “alundum” in a Sentence
adjective
British English
- The alundum lining proved highly resistant to thermal shock.
- We need an alundum-based grinding compound.
American English
- The alundum refractory brick lasted for years.
- They specified an alundum coating for the component.
Usage
Meaning in Context
Business
Rare; might appear in industrial supply catalogues or procurement specifications.
Academic
Used in materials science, engineering, and geology papers discussing abrasives or refractories.
Everyday
Virtually never used.
Technical
The primary register; used precisely to specify a type of abrasive or refractory component.
Vocabulary
Synonyms of “alundum”
Vocabulary
Antonyms of “alundum”
Watch out
Common Mistakes When Using “alundum”
- Misspelling as 'aluminum' or 'alumina' (though related).
- Using it as a general term for any abrasive.
- Incorrect pronunciation stressing the first syllable (/ˈæləndəm/).
FAQ
Frequently Asked Questions
Alundum is a synthetic, man-made material produced by fusing bauxite (an aluminium ore).
Its primary uses are as an abrasive (in grinding wheels, sandpaper) and as a refractory material (lining for high-temperature furnaces).
No, it is specific. While some sandpaper uses alundum grit, the term correctly refers to the specific synthetic aluminium oxide material, not the sandpaper product itself.
It is pronounced /əˈlʌndəm/, with the stress on the second syllable: uh-LUN-duhm.
A synthetic fused alumina (Al₂O₃) used primarily as an abrasive or refractory material.
Alundum is usually technical/industrial in register.
Learning
Memory Aids
Mnemonic
Think: 'A LUNch for DUMmies' is hard to chew, just like ALUNDUM is a hard abrasive.
Conceptual Metaphor
HARDNESS IS DURABILITY / INDUSTRIAL TOUGHNESS.
Practice
Quiz
In which industry is 'alundum' MOST likely to be used?