1553, "registrar, clerk," from L. actuarius "copyist, account-keeper," from actus "public business" (see act). Modern insurance office meaning first recorded 1849.
Main Entry: ac·tu·ary Pronunciation: 'ak-ch&-"wer-E, -sh&- Function: noun Inflected Form: plural-ar·ies : a person who calculates insurance and annuity premiums, reserves, and dividends