|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a fool or simpleton; ninny.|
|—n , pl -tos|
|short for photograph|
|1.||of, relating to, or produced by light: photosynthesis|
|2.||indicating a photographic process: photolithography|
|[from Greek phōs, phōt- light]|
photo- or phot-
Light; radiant energy: photosynthesis.
A prefix that means "light," as in photoreceptor.