carborundum
Произношение: [kɑːrbəˈrʌndəm]
Слово
Контекст: «material science»
(noun) Carborundum is a very hard material made of silicon carbide. It's often used for making tools that grind or cut other materials because it’s really tough.
Пример
The workshop uses carborundum to create strong cutting tools that last a long time.
Пример
The standard tools couldn't compete with the durability of carborundum, as they wore out quickly.
Пример
Do you know why carborundum is preferred for manufacturing cutting tools?
Контекст: «historical product»
(noun) Carborundum was originally a trademark name for a type of abrasive that is made from silicon carbide. It was first created in the late 19th century.
Пример
Back in the day, carborundum was widely used for polishing glass and metals.
Пример
Today, most people don't use carborundum as much as they used to because there are better options available.
Пример
What do you think made carborundum so popular in the past?
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