fraction frac·tion (frāk'shən)
n.
An expression that indicates the quotient of two quantities.
A chemical component separated by fractionation.
A disconnected piece; a fragment.
An aliquot portion or any portion.
fraction [%PREMIUM_LINK%] (frāk'shən) Pronunciation Key

A mathematical expression representing the division of one whole number by another. Usually written as two numbers separated by a horizontal or diagonal line, fractions are also used to indicate a part of a whole number or a ratio between two numbers. Fractions may have a value of less than one, as with 1/2, or equal to one, as with 2/2, or more than one, as with 3/2. The top number of a fraction is the numerator and the bottom number is the denominator.