Dictionary entry

Ratiocinate

Webster's Dictionary 1913

Ra′ti‐oc″i‐nate (răsh′ĭ‐ŏs″ĭ‐nāt), v. i. [L. ratiocinatus, p. p. of ratiocinari, fr. ratio reason. See Ratio.] To reason, esp. deductively; to offer reason or argument.