Arbitrary quantity

(Math.) one to which any value can be assigned at pleasure.

See also: Arbitrary

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Note that if the cloud area fraction is denoted by [sigma], the horizontal mean value of an arbitrary quantity [bar.[psi]] given by [bar.[psi]] = [[sigma][psi].sub.c] + (1 - [sigma]) [[psi].sub.e], where the subscripts 'c' and 'e' denote mean in-cloud and environmental values, respectively.
Setting some arbitrary quantity of drugs is no way to find out if someone is a dealer.
"The problem was that we assumed we could release empty vehicles in some arbitrary quantity. Sometimes that number coincided with the number of bags waiting, but sometimes it didn't."

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