verb (used without object), ra·ti·oc·i·nat·ed, ra·ti·oc·i·nat·ing. to
reason; carry on a process of reasoning.
Origin:
1635–45; < Latin ratiōcinātus past participle of ratiōcinārī to reckon, calculate, conclude, verbal derivative of ratiō reason
Related forms ra·ti·oc·i·na·tor, noun