\Nu"mer*a"tor\, n. [L. numerator: cf. F.
num['e]rateur.]
1. One who numbers.
2. (Math.) The term in a fraction which indicates the number
   of fractional units that are taken.
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}.