v.
Pronunciation: ˌ ra-t ē - ' ō -s ə - ˌ n ā t, ˌ ra-sh ē -, - ' ä-
Function: intransitive verb
Inflected Form: -nat · ed ; -nat · ing
Etymology: Latin ratiocinatus, past participle of ratiocinari to reckon, from ratio + -cinari (as in vaticinari to prophesy) ― more at VATICINATE
Date: 1643
: REASON
– ra · ti · o · ci · na · tor \ - ˌ ā -t ə r \ noun