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bipack

American

[bahy-pak] / ˈbaɪˌpæk /

noun

Photography.

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.

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