picturenumber
nounUK /ˈpɪktʃə ˈnʌmbə/
US /ˈpɪktʃər ˈnʌmbər/
A picture number is a number that tells you which picture is which.
The teacher wrote a picture number under each drawing so we could find them easily.
OTHER MEANINGS
2. The number printed on a photograph or illustration to identify it in a set.
Check the picture number on the back of the photo to order a copy.
3. A number used to point to a specific image in a book or catalog.
Turn to picture number twelve in the catalog to see the red shoes.
4. A code number for a picture stored in a computer or camera.
The camera saved the file as picture number 0045.