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DictionaryrationalRatio of integers
adjective / noun

rational

A number expressible as a ratio of two integers with a nonzero denominator.

One-half is a rational number.

Etymology
rationalLatinof reckoning or reason

The mathematical adjective is associated with ratio and reckoning. A rational number can be represented exactly by a ratio of two integers.

More examples

  • Every integer is rational.
  • The exercise asks which values are rationals.
  • The square root of two is not rational.

Forms

rational · rationals

Similar words

fraction
One way to express a rational number.
integer
A whole number, a subset of rational numbers.