(mathematics, complex analysis, algebraic geometry) Any function expressible as the quotient of two (coprime) polynomials (and which thus has poles at a finite, discrete set of points which are the roots of the denominator).

an advocate of rational egoism

(philosophy) The doctrine that it is rational to act in one's own self-interest. / (philosophy) A theory espoused by Ayn Rand, combining this doctrine with ethical egoism.

A person who follows the philosophy of rationalism

To use the powers of the mind logically and methodically; to reason.

plural of rationale

simple past tense and past participle of ratiocinate

present participle of ratiocinate

Third-person singular simple present indicative form of ratiocinate

Of or relating to rationalism.