photomontage

[ foh-tuh-mon-tahzh ]
/ ˌfoʊ tə mɒnˈtɑʒ /

noun Photography.

a combination of several photographs joined together for artistic effect or to show more of the subject than can be shown in a single photograph.
Also called montage.

Origin of photomontage

First recorded in 1930–35; photo- + montage

British Dictionary definitions for photomontage

photomontage
/ (ˌfəʊtəʊmɒnˈtɑːʒ) /

noun

the technique of producing a composite picture by combining several photographs: used esp in advertising
the composite picture so produced