Cath·e·rine I 
(kăthər-ĭn, kăthrĭn) 1684?-1727.
(kăthər-ĭn, kăthrĭn) 1684?-1727. Empress of Russia (1725-1727) as successor to her husband, Peter the Great. She founded the Russian Academy of Sciences (1725).
- postglacial
- postgraduate
- posthaste
- post hoc
- posthole
- posthumous
- posthumously
- posthumousness
- posthypnotic suggestion
- postiche
- postilion
- postillion
- postimpressionism
- postimpressionist
- postimpressionistic
- postindustrial
- posting
- Post-it
- postlapsarian
- postlude
- postman
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- postmaster
- postmaster general
- postmastership