n. pl. ac·tu·ar·ies A statistician who computes insurance risks and premiums. [Latin āctuārius, secretary of accounts, from ācta, records, from neuter pl. past participle of agere, to drive, do; see ag- in the Appendix of Indo-European roots.] ac′tu·ari·al (-ârē-əl) adj. ac′tu·ari·al·ly adv. |
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