From French ratiocination, from Latin ratiōcinātiō (“argumentation, reasoning, ratiocination; a syllogism”), from ratiōcinātus (“reckoned”), perfect passive participle of ratiōcinor (“to compute, reckon; to argue, infer”), from ratiō (“reason, explanation”) (from reor (“to calculate, reckon”), possibly from Proto-Italic *rēōr, from Proto-Indo-European *h₂reh₁- (“to put in order”)) + -cinor, modelled after vāticinor (“to foretell, prophesy”).
- (Received Pronunciation) IPA(key): /ɹætɪˌɒsɪˈneɪʃn̩/
- (General American) IPA(key): /ɹætiˌɑsiˈneɪʃn̩/, /ɹæɾi-/
- Hyphenation: ra‧ti‧o‧ci‧na‧tion
- Reasoning, conscious deliberate inference; the activity or process of reasoning.
1663, Samuel Butler, Hudibras. The First Part. Written in the Time of the Late Wars, London: Printed by J. G. for Richard Marriot [...], OCLC 4023163; republished as Hudibras. In Three Parts. Written in the Time of the Late Wars. Corrected and Amended: with Additions. To which is Added Annotations, with an Exact Index to the Whole. Adorn’d with a New Set of Cuts, from the Designs of Mr. [William] Hogarth, Dublin: Printed by S. Powell, for R. Gunne, G. Risk, G. Ewing, and W. Smith, 1732, OCLC 938431277, canto I, lines 77–80, page 20:
- He'd run in Debt by Diſputation, / And pay with Ratiocination. / All this by Syllogiſm, true / In Mood and Figure, he wou'd do.
- Thought or reasoning that is exact, valid and rational.
- A proposition arrived at by such thought.
- “ratiocination” in John A. Simpson and Edward S. C. Weiner, editors, The Oxford English Dictionary, 2nd edition, Oxford: Clarendon Press, 1989, ISBN 978-0-19-861186-8.