rational
/ˈɹæʃ(ə)nəl/ noun C2- A rational number: a number that can be expressed as the quotient of two integers. · The quotient of two rationals is again a rational.
Plural rationals
From the library
"She is ill, but she is quite rational."
Faria, since their first acquaintance, had been on all points so rational and logical, so wonderfully sagacious, in fact, that he could not understand how so much wisdom on all points could be allied with madness.
He was, too, very learned, and rational enough on all points which did not relate to his treasure; but on that, indeed, he was intractable.”
It would surely be much more rational if conversation instead of dancing made the order of the day.”
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