
Latin, meaning: the aristocratic party.
Found on
http://archives.nd.edu/ooo.htm

The optimates (`Best Men,` singular optimas; also known as boni, `Good Men`) were the traditionalist majority of the late Roman Republic. They wished to limit the power of the popular assemblies and the Tribune of the Plebs, and to extend the power of the Senate, which was viewed as more dedicated to the interests of the aristocrats who held t...
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http://en.wikipedia.org/wiki/Optimates

• (n. pl.) The nobility or aristocracy of ancient Rome, as opposed to the populares.
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http://thinkexist.com/dictionary/meaning/optimates/

The optimates, as a Roman political group, was the senatorial party in the later stages of the Republic from the days of the brothers Gracchus onwards. The optimates were the opposing conservative force to the populares, defending the traditions of Rome and the existing order. Also a Byzantine elite cavalry force.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Op`ti·ma'tes noun plural [ Latin See
Optimate .] The nobility or aristocracy of ancient Rome, as opposed to the
populares .
Found on
http://www.encyclo.co.uk/webster/O/27

optimates 1. The aristocracy of ancient Rome. 2. Literally, adherents of the best men.
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http://www.wordinfo.info/words/index/info/view_unit/3696/

the aristocratic party.
Found on
https://www.math.ubc.ca/~cass/frivs/latin/latin-dict-full.html
No exact match found.