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photodegradable

(fōt′ō dē grādə bəl)

adjective

that will decompose under exposure to certain kinds of radiant energy, esp. ultraviolet light, as certain plastics or insecticides

Origin: photo- + (bio)degradable

See photodegradable in American Heritage Dictionary 4

adjective
Capable of being chemically broken down by light: photodegradable plastic.

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