SI prefix

(sAn SI prefix is a Greek prefix, that, when applied to a word, means to multiply that word by a particular power of ten. Examples of applications of SI prefixes include kilometer, megapixel, and gigabyte.

The standard large and small SI prefixes are given below.

Andre Joyce's extension
Andre Joyce fabricated an extension to the system, noting that zetta and yotta seem related to setta (Italian "seven") and otto (Italian "eight.") Following the reverse-alphabet pattern, we have xova- \(= 10^{27}\), x + nove, and weica- \(= 10^{30}\), w + dieci. (The last letter has been changed to a to keep the pattern.)

From here, only the first syllable of the Italian number is used. We have:


 * vunda- \(= 10^{33}\), v + und(ici)
 * uda- \(= 10^{36}\), u + (do)d(ici)
 * treda- \(= 10^{39}\), t + tred(ici)
 * satta- \(= 10^{42}\), s + (qu)att(ordici)
 * rinda- \(= 10^{45}\), r + (qu)ind(ici)
 * qeda- \(= 10^{48}\), q + (s)ed(ici)

Jim Blowers extension
Initially Jim Blowers, like Andre Joyce, follows reverse-alphabet pattern and extends his system up to vigintillion:


 * xona- = 1027
 * weka- = 1030
 * vunda- = 1033
 * uda- = 1036
 * treda- = 1039
 * sorta- = 1042
 * rinta- = 1045
 * quexa- = 1048
 * pepta- = 1051
 * ocha- = 1054
 * nena- = 1057
 * minga- = 1060
 * luma- = 1063

However, recently he changed this system and proposed his own system of prefixes up to 103000. Here is a list of his prefixes:


 * nina- = 1027
 * tena- = 1030
 * tenakilo- = 1033
 * tenamega- = 1036
 * tenagiga- = 1039
 * tenatera- = 1042
 * tenapeta- = 1045
 * tenaexa- = 1048
 * tenazetta- = 1051
 * tenayotta- = 1054
 * tenanina- = 1057
 * bitena- = 1060
 * bitenakilo- = 1063
 * quadtena- = 10120
 * huna- = 10300
 * tousa- = 103000

Hella-extension
Austin Sendek, a University of California student, started a (somewhat jocular) Facebook petition to make "hella-" the official SI prefix for. "" is a slang term originating out of Northern California, meaning "a lot of" or "very". The term has not become official, but both Google and Wolfram|Alpha have both adopted it into their calculator systems.