rational

(redirected from rationalness)
Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.

rational

 [rash´un-al]
based upon reason; characterized by possession of one's reason.

ra·tion·al

(rash'un),
1. Pertaining to reasoning or to the higher thought processes; based on objective or scientific knowledge, in contrast to empiric (1).
2. Influenced by reasoning rather than by emotion.
3. Having the reasoning faculties; not delirious or comatose.
[L. rationalis, fr. ratio, reason]

rational

/ra·tion·al/ (ră´shun-al) based upon reason; characterized by possession of one's reason.

rational

(răsh′ə-nəl)
adj.
1. Having or exercising the ability to reason.
2. Consistent with or based on reason or good judgment; logical or sensible: rational decisions.

ra′tion·al·ly adv.
ra′tion·al·ness n.

rational

[rash′ənəl]
Etymology: L, rationalis, reasonable
1 pertaining to a measure, method, or procedure based on reason.
2 pertaining to a therapeutic method based on an understanding of the cause and mechanisms of a specific disease and the potential effects of the drugs or procedures used in treating the disorder.
3 sane; capable of normal reasoning or behavior.

ra·tion·al

(rash'ŭn-ăl)
1. Pertaining to reasoning or to the higher thought processes; based on objective or scientific knowledge, in contrast to empiric (1).
2. Influenced by reasoning rather than by emotion.
3. Having the reasoning faculties; not delirious or comatose.
[L. rationalis, fr. ratio, reason]

rational

based upon reason.

rational deductive diagnosis
a diagnosis based on rationalization of the signs with pathological and epidemiological principles, as distinct from empirical diagnosis.