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cube root

American

noun

Mathematics.

a quantity of which a given quantity is the cube.

The cube root of 64 is 4.

cube root British

noun

the number or quantity whose cube is a given number or quantity: 2 is the cube root of 8 (usually written ³√ 8 or 8 ^1⁄3 )

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

cube root Scientific

The number whose cube is equal to a given number. For example, the cube root of 125 is 5, since 5 ³ = 125.

Etymology

Origin of cube root

First recorded in 1690–1700

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Mary: The cube root of 2,197 is 13.

From Scientific American • Nov. 25, 2020

The next example involves a cube root and so will require different thinking.

From Textbooks • May 6, 2020

The cube root then will be between 4 and 5.

From Textbooks • May 6, 2020

More notably, 2017 is the smallest whole number whose cube root begins with ten distinct digits:

From The Guardian • Jan. 2, 2017

He was then requested to name the cube root of 268,336,125, and with equal facility and promptness he replied, 645.

From Curiosities of Human Nature by Anonymous

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023