| photo- | |
| —combining form | |
| 1. | of, relating to, or produced by light: photosynthesis |
| 2. | indicating a photographic process: photolithography |
| [from Greek phōs, phōt- light] | |
| a scrap or morsel of food left at a meal. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
photo- or phot-
pref.
Light; radiant energy: photosynthesis.
Photographic: photofluorography.
| photo-
A prefix that means "light," as in photoreceptor. |