ratiocinate

1 of 2

verb

ra·​ti·​o·​ci·​nate ˌra-tē-ˈō-sə-ˌnāt 

ˌra-shē-, 

-ˈä-

ratiocinated; ratiocinating

intransitive verb

: reason

ratiocinator

ˌra-tē-ˈō-sə-ˌnā-tər 

ˌra-shē-, 

-ˈä-

noun

ratiocinator

2 of 2

noun

ra·​ti·​o·​ci·​na·​tor ˌra-tē-ˈō-sə-ˌnā-tər 

ˌra-shē-, 

-ˈä-

plural -s

: reasoner

Word History

Etymology

Verb

Latin ratiocinatus, past participle of ratiocinari to reckon, from ratio + -cinari (as in vaticinari to prophesy) — more at vaticinate

Noun

Latin, from ratiocinatus + -or

First Known Use

Verb

1643, in the meaning defined above