multiexposure
/ˌmʌltɪɪkˈspəʊʒə/ /ˌmʌltɪɛkˈspəʊʒə/Photography
noun
A negative or positive image obtained from taking two or (usually) more superimposed photographs on the same section of film.
adjective
Involving or relating to multiexposure images or photographs or the camera mode or facility for taking them.
Origin
1920s. From multi- + exposure. Compare earlier double exposure, multiple exposure.