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# invariant

[in-vair-ee-uh nt] /ɪnˈvɛər i ənt/
1.
unvarying; invariable; constant.
2.
Mathematics. normal (def 5e).
noun
3.
Mathematics. a quantity or expression that is constant throughout a certain range of conditions.
Origin of invariant
1850-1855
First recorded in 1850-55; in-3 + variant
Related forms
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for invariant
Historical Examples
• If triangles and genera are of our own production we can keep them invariant.

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

Alexander Findlay
• We again obtain, therefore, the invariant system ice—salt—solution—vapour.

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

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

Alexander Findlay
• Since the cryohydric point is a quadruple point in a two-component system, it represents an invariant system.

Alexander Findlay
• This, of course, will constitute an invariant system, and the point will correspond to the point C in Fig. 108.

Alexander Findlay
• Since, in all cases, there can be but one gas phase, four solid phases will be necessary in order to form an invariant system.

Alexander Findlay
• She is the invariant of each of her iconic Mantrams and her surroundings are the variables that enter and leave the screen.

Roger Phillips Graham
• Now the possibility of translation implies the existence of an invariant.

British Dictionary definitions for invariant

## invariant

/ɪnˈvɛərɪənt/
noun
1.
(maths) an entity, quantity, etc, that is unaltered by a particular transformation of coordinates: a point in space, rather than its coordinates, is an invariant
2.
(maths) (of a relationship or a property of a function, configuration, or equation) unaltered by a particular transformation of coordinates
3.
a rare word for invariable
Derived Forms
invariance, invariancy, noun
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
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Word Origin and History for invariant

1851, from in- (1) "not" + variant.

Online Etymology Dictionary, © 2010 Douglas Harper
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### Word Value for invariant

0
15
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