[ kyoo-bik ]
/ ˈkyu bɪk /



Mathematics. a cubic polynomial or equation.



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Origin of cubic

1490–1500; earlier cubik < Latin cubicus < Greek kybikós. See cube1, -ic


cu·bic·i·ty [kyoo-bis-i-tee] /kyuˈbɪs ɪ ti/, nounsub·cu·bic, adjectiveun·cu·bic, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for cubic

British Dictionary definitions for cubic

/ (ˈkjuːbɪk) /


having the shape of a cube
  1. having three dimensions
  2. denoting or relating to a linear measure that is raised to the third powera cubic metre Abbreviation: cu., c
maths of, relating to, or containing a variable to the third power or a term in which the sum of the exponents of the variables is three
Also: isometric, regular crystallog relating to or belonging to the crystal system characterized by three equal perpendicular axes. The unit cell of cubic crystals is a cube with a lattice point at each corner (simple cubic) and one in the cube's centre (body-centred cubic), or a lattice point at each corner and one at the centre of each face (face-centred cubic)


  1. a cubic equation, such as x ³ + x + 2 = 0
  2. a cubic term or expression
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

Scientific definitions for cubic

[ kyōōbĭk ]

Referring to a volume unit of measurement.
Involving a number or a variable that has been raised to the third power.
Relating to a crystal having three axes of equal length intersecting at right angles. The mineral pyrite has cubic crystals. Also called isometric See illustration at crystal.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.