1 definition by Sckela-xela

Top Definition
An "SI" prefix meaning 10^21, also known as a sextillion. It's more commonly used a a phrase meaning "very" by the character Sho Miyamoto in the Square Enix game, The World Ends With You.
Zettahertz
"Wow, that's zetta cool!"
by Sckela-xela January 07, 2009

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