that will decompose under exposure to certain kinds of radiant energy, esp. ultraviolet light: said as of certain plastics or insecticides
Origin of photodegradablephoto- + (bio)degradable
Capable of being chemically broken down by light: photodegradable plastic.
(comparative more photodegradable, superlative most photodegradable)
- Capable of being chemically broken down as the result of a photochemical reaction