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variable

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adjective

apt or likely to change or vary; changeable, inconstant, fickle, fluctuating, etc.
that can be changed or varied
Biol. tending to deviate in some way from the type; aberrant
Math. having no fixed value

noun

anything changeable; esp., a quality or quantity that varies or may vary
a shifting wind
Astron. variable star
Math., Physics
1. a part of a mathematical expression that may assume any value in a specific, related set of values
2. a symbol for such a part

Related Forms:

variability noun or variableness
variably adverb

See variable in American Heritage Dictionary 4

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VARIA (abbreviation)

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