rational
ra·tio·nal
adj \ˈrash-nəl, -ən-əl\Definition of RATIONAL
1
a : having reason or understanding b : relating to, based on, or agreeable to reason <a rational explanation> <rational behavior>
2
: using medical treatments based on reason or general principles—used especially of an ancient school of physicians; compare empirical 1a
—ra·tio·nal·ly \-ē\ (audio pronunciation) adverb
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