Zeptendeco-

Zeptendeco (#17, abbv. zpd) is a numerical prefix meaning 10-51 or sexdecillionth using the short scale illion system.Tier -1 and upper Tier -2 prefixes trakaplex.wordpress.com. Retrieved 2021-08-08. The term was coined as part of Trakaplex's SI system. It comes from septendecim, following the same initial letter as zepto because of the 's' in the Latin origins (and also seven, seventeen). When zedeco- was named vedeco the abbreviation for zeptendeco was just zd, now zedeco has it. 
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== See also ==
Category:Prefixes by Trakaplex
Category:Prefixes
Category:Tier -1 Prefixes