The crossword solution for the term 'thumbnail or JPEG, e.g.' is IMAGE. An IMAGE is a two-dimensional representation of a physical object, such as a photograph, painting, or drawing. Images can be stored in various formats, such as JPEG, PNG, GIF, and TIFF. Thumbnails are small versions of an IMAGE, usually used to preview the full-size version. JPEG is a popular IMAGE format that is used to store digital photographs.