cube root


Definition of cube root

: a number whose cube is a given number

Examples of cube root in a Sentence

The cube root of 8 is 2.
Recent Examples on the Web In mathematical terms, the amplitude for exchange of our quarticles will be multiplied by the cube root of –1. Quanta Magazine, "Inside the Knotty World of ‘Anyon’ Particles," 28 Feb. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cube root.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of cube root

1679, in the meaning defined above

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The first known use of cube root was in 1679

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Cite this Entry

“Cube root.” The Dictionary, Merriam-Webster Inc., Accessed 6 December 2019.

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More Definitions for cube root

cube root


English Language Learners Definition of cube root

mathematics : a number that produces a specified number when it is multiplied by itself twice

More from Merriam-Webster on cube root

Rhyming Dictionary: Words that rhyme with cube root Encyclopedia article about cube root

Comments on cube root

What made you want to look up cube root? Please tell us where you read or heard it (including the quote, if possible).


very cautious or careful

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