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bipack

American  
[bahy-pak] / ˈbaɪˌpæk /

noun

Photography.

  1. two separate films, each having an emulsion layer sensitive to a different color, held together with their emulsion layers facing for simultaneous exposure through the back of one.

Etymology

Origin of bipack

First recorded in 1920–25; bi- 1 + pack 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.