Unit prefix or if letters such as "T", which are already in use as SI units or prefixes, will again be skipped. Several personal proposals have been made for extending the series of prefixes, with ascending terms such as "xenna, weka, vendeka" (from Greek "ennea" (9), "deka" (10), "endeka" (11)) and descending terms such as "xono", "weco", "vundo" (from Latin "novem/nona" (9), "dec" (10), "undec" (11). Using Greek for ascending and Latin for descending would be consistent with established prefixes such as "deca, hecto, kilo" vs "deci, centi, milli"). Although some of these are repeated on the internet, none are in actual
Greek East and Latin West Mediterranean as having an East/West cultural split. Cultures associated with the historical Iberians, Goths, Franks, Hungarians, Lithuanians, Celts, West Slavs and the historical Roman Catholic Church (Central and Western Europe) have traditionally been considered "Western"; these cultures adopted Latin as their lingua franca in the Middle Ages. Cultures associated with the Byzantine and Russian Empires (Greeks, Orthodox Slavs (East and South Slavs), Romanians and to a lesser extent Albanians) have traditionally been considered "Eastern"; these cultures all used Greek or Old Church Slavonic as a lingua franca during the early Middle Ages. In the classical context, "Greek East" refers to