rational

sifat adjective

1. Capable of reasoning. Man is a rational creature.
2. Logically sound; not contradictory or otherwise absurd. His statements were quite rational.
3. (of a person or personal characteristics) Healthy or balanced intellectually; exhibiting reasonableness. rational conduct
4. Of a number, capable of being expressed as the ratio of two integers. ¾ is a rational number, but √2 is an irrational number.

ot noun

1. A rational number: a number that can be expressed as the quotient of two integers. The quotient of two rationals is again a rational.
2. The breastplate worn by Israelite high priests.