corundum
An extremely hard mineral, a form of aluminum oxide with the chemical formula Al₂O₃,…An extremely hard mineral, a form of aluminum oxide with the chemical formula Al₂O₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.
» Sapphire is the blue form of corundum.
Значение
значений: 1(исчисляемое, неисчисляемое)An extremely hard mineral, a form of aluminum oxide with the chemical formula Al₂O₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.
Korund
кору́ндkorúnd
кору́ндkorúnd
very hard mineral used as an abrasive
Примеры
предложений: 6Sapphire is the blue form of corundum.
Ruby is the red form of corundum.
Several precious stones are a form of corundum.
Corundum is a form of aluminum oxide.
Corundum comes in all colors of the rainbow.
Переводы
языков: 9По значениям 1
По значениям 1
По значениям 1
Происхождение
From Tamil குருந்தம் (kuruntam, “ruby, sapphire”) First attested in the early 18th centuryFrom Tamil குருந்தம் (kuruntam, “ruby, sapphire”) First attested in the early 18th century.
Wiktionary, CC BY-SA 4.0 · source
Формы
мн. число: corundumsСинонимы
синонимов: 1- very hard mineral used as an abrasive:corundom
Однокоренные
связанных слов: 4Уроки к слову
уроков: 1- A1Исчисляемые и неисчисляемые существительные — Потому что оно может быть неисчисляемым