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[rash-uh-nal] /ˌræʃ əˈnæl/

the fundamental reason or reasons serving to account for something.
a statement of reasons.
a reasoned exposition of principles.
a reasoned exposition, esp one defining the fundamental reasons for a course of action, belief, etc

1650s, “exposition of principles,” from Late Latin rationale, noun use of neuter of Latin rationalis “of reason” (see rational). Hence, “fundamental reason” (1680s).


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    noun, Mathematics. 1. a quotient of two polynomials with integral coefficients.

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