The Collaborative International Dictionary
Ratiocinate \Ra`ti*oc"i*nate\ (r[a^]sh`[i^]*[o^]s"[i^]*n[=a]t), v. i. [L. ratiocinatus, p. p. of ratiocinari, fr. ratio reason. See Ratio.] To reason, esp. deductively; to offer reason or argument.
Douglas Harper's Etymology Dictionary
"to reason," 1640s, from Latin ratiocinatus, past participle of ratiocinare (see ratiocination). Related: Ratiocinant.
Wiktionary
vb. To use the powers of the mind logically and methodically; to reason.
WordNet
v. reason methodologically and logically
Usage examples of "ratiocinate".
Max Ratiocinate, the cube-headed robot in charge of subsurface security.
He was good for headache and warded off thought when Eddi ratiocinated about sparrows.
He was good for headache and warded off thought when Eddi ratiocinated about sparrows.
The prof ratiocinated on such a rarefied level that poor Finster was totally out of his league, lost in a labyrinth of symbolic logic, gestalts, alatory subintellections, and other horrors.