ac·tu·ar·y 
(ăkch-ĕr′ē)
(ăkch-ĕr′ē)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.
- opinionate
- opinionated
- opinionatedly
- opinionative
- opinionatively
- opioid
- opisthobranch
- opisthognathism
- opisthognathous
- opium
- opium poppy
- Oporto
- opossum
- opossum shrimp
- Oppenheimer
- opponency
- opponent
- opportune
- opportunely
- opportuneness
- opportunism
- opportunist
- opportunistic
- opportunistic infection
- opportunity