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The Collaborative International Dictionary of English v.0.48 (gcide)

Numerator \Nu"mer*a"tor\, n. [L. numerator: cf. F.
num['e]rateur.]
1. One who numbers.
[1913 Webster]

2. (Math.) The term in a fraction which indicates the number
of fractional units that are taken.
[1913 Webster]

Note: In a vulgar fraction the numerator is written above a
line; thus, in the fraction 5/9 (five ninths) 5 is the
numerator; in a decimal fraction it is the number which
follows the decimal point. See {Fraction}.
[1913 Webster] Numeric

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