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corundum

/kɔ'rʌndəm/
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Word: Corundum

Part of Speech: Noun

Definition: Corundum is a very hard mineral that is mainly used as an abrasive. This means it is used to grind, polish, or cut other materials because of its toughness.

Usage Instructions: You can use the word "corundum" when talking about materials in industries like manufacturing, jewelry, or when discussing geology. It is not a commonly used word in everyday conversation, but it can come up in scientific or technical discussions.

Example Sentence: The jeweler used corundum to polish the surface of the gemstone, making it shine beautifully.

Advanced Usage: In a more technical context, you might say, "Corundum is the second hardest natural mineral, surpassed only by diamond, and is classified as a crystalline form of aluminum oxide (Al2O3)."

Word Variants: - Corundum (noun): The mineral itself. - Corundum-based (adjective): Describing something that is made from or contains corundum, such as corundum-based abrasives.

Different Meanings: In addition to its primary meaning as a mineral, "corundum" can also refer to specific types of gemstones, such as sapphires and rubies, which are both forms of corundum.

Synonyms: - Abrasive (in the context of its use) - Alumina (in its chemical composition context)

Idioms and Phrasal Verbs: There are no specific idioms or phrasal verbs associated with "corundum," as it is a more technical term.

Summary: Corundum is a tough mineral used mainly for grinding and polishing. It's important in certain industries, particularly in jewelry and manufacturing.

Noun
  1. very hard mineral used as an abrasive

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