# invariant

[in-vair-ee-uh nt]

- unvarying; invariable; constant.
- Mathematics. normal(def 5e).

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- Mathematics. a quantity or expression that is constant throughout a certain range of conditions.

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## Origin of invariant^{}

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for invariant

### Historical Examples

#### If triangles and genera are of our own production we can keep them invariant.

The Meaning of TruthWilliam James

#### At this point there exists the invariant system solid nitrile, two liquid phases, vapour.

The Phase Rule and Its ApplicationsAlexander Findlay

#### We again obtain, therefore, the invariant system ice—salt—solution—vapour.

The Phase Rule and Its ApplicationsAlexander Findlay

#### K is also an invariant point at which potassium iodide is in equilibrium with two liquid phases and vapour.

The Phase Rule and Its ApplicationsAlexander Findlay

#### At this point the system is invariant, and the pressure will therefore remain constant until all the iodine has disappeared.

The Phase Rule and Its ApplicationsAlexander Findlay

## invariant

- maths an entity, quantity, etc, that is unaltered by a particular transformation of coordinatesa point in space, rather than its coordinates, is an invariant

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- maths (of a relationship or a property of a function, configuration, or equation) unaltered by a particular transformation of coordinates
- a rare word for invariable

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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

## Word Origin and History for invariant

Online Etymology Dictionary, © 2010 Douglas Harper