cube root


noun Mathematics.

a quantity of which a given quantity is the cube: The cube root of 64 is 4.

Origin of cube root

First recorded in 1690–1700 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for cube root

Historical Examples of cube root

  • How many litres of champagne can be extracted from the cube-root of one turnip?

    This Giddy Globe

    Oliver Herford

  • Adieu, beloved grammar; and farewell, most fragrant extract of cube-root, as well as birch-oil.

  • I'd rather have let cube-root go and have kept more of my imagination.

    August First

    Mary Raymond Shipman Andrews and Roy Irving Murray

British Dictionary definitions for cube root

cube root


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 in Science

cube root

The number whose cube is equal to a given number. For example, the cube root of 125 is 5, since 53 = 125.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.