photomosaic
/ˈfoʊtoʊmoʊˌzeɪɪk/
noun
- A picture made up of many smaller photographs or images that together form a larger image, especially when viewed from a distance.
- The museum displayed a giant photomosaic of the Earth composed of satellite images.
- The artist created a photomosaic of the Mona Lisa using thousands of tiny travel photos.
- Our class made a photomosaic of the school mascot from everyone's selfies.