[king of Sparta] Prytanis (Πρύτανις; reigned from c. 860 to c. 830 BC) was king of Sparta and a member of the Eurypontid dynasty. He was succeeded by king Polydectes. ...
Found on
http://en.wikipedia.org/wiki/Prytanis_(king_of_Sparta)

• (n.) A member of one of the ten sections into which the Athenian senate of five hundred was divided, and to each of which belonged the presidency of the senate for about one tenth of the year.
Found on
http://thinkexist.com/dictionary/meaning/prytanis/
Pryt'a·nis noun ;
plural Prytanes . [ Latin , from Greek ....]
(Gr. Antiq.) A member of one of the ten sections into which the Athenian senate of five hundred was divided, and to each of which belonged the presidency of the senate for about one tenth of the year.
Found on
http://www.encyclo.co.uk/webster/P/185
No exact match found.