The story
Originally Polyfoto (“a commercial venture”), from poly- and photo.
Etymology from Wiktionary, CC BY-SA 4.0.
polyfoto
Today it means: One of a series of 48 photographs (similar to photo booth photos) taken using a Polyfoto camera, which used a single glass plate negative, the operator turning a handle on the side to take each exposure and also move the plate. Full definition →