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.