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Pronunciation: 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]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.