a form of microfiche with the images greatly reduced in size, generally by a factor of 100 or more.
Origin of ultrafiche
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a sheet of film, usually the size of a filing card, that is similar to a microfiche but has a much larger number of microcopies
Word Origin for ultrafiche
C20: from ultra- + French fiche small card. See microfiche
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