Dictionary.com
Thesaurus.com

mebi-

British  
/ ˈmɛbɪ /

prefix

  1.  Micomputing denoting 2 20

    mebibyte

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of mebi-

C20: from me ( ga- ) + bi ( nary )