floating-point notation
floa·ting·point·notation
noun
1.
a radix numeration system in which the location of the decimal point is indicated by an exponent of the radix; in the floating-point representation system, 0.0012 is represented as 0.12-2 where -2 is the exponent
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WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.