i Register
In some senses, photo is marked as informal. Watch for register when choosing this word.
noun
A photograph.
Not long ago, it was difficult to produce photographs of tiny creatures with every part in focus. That’s because the lenses that are excellent at magnifying tiny subjects produce a narrow depth of field. A photo processing technique called focus stacking has changed that.
A photo finish.
By this stage, Goof was clearly warming to his theme and, as they flashed past the post together, he reported that it was a photo. "And I don't know or care who won the photo," he concluded.
A digital picture of any kind.
Photography
Photo student in need of subjects.
verb
To take a photograph of.
[1956] 1992 ed., The Complete Lyrics of Cole Porter http://print.google.com/print?hl=en&id=5kjheskJwVAC&pg=PA465&lpg=PA465&sig=_CY8N5ZLStxnOIlf_CNHhhBEPjA What fun to be photoed together, / What luck for a break so opportune. / Oh, what a lark / To be posed in the park / Underneath the adolescent crescent of the moon.
1998, Hans Schmidt, Maverick Marine http://print.google.com/print?hl=en&id=vQ7DKhq0ZckC&pg=PA192&lpg=PA192&sig=hrMAoHDI9vAnq4RQwgFro_Lp24M He even had himself photoed helping to hold one of the fire-hose.