Definition of photosensitize in US English:

photosensitize

(also photosensitise)

verb

  • 1with object Chemistry and Biochemistry. Of a substance: to initiate (a chemical change) by absorbing light energy and transferring it to a reactant.

  • 2with object To make photosensitive.

Origin

Early 20th century. From photo- + sensitize. Compare slightly earlier photosensitized, photosensitizer.

Pronunciation

photosensitize

/ˌfəʊtəʊˈsɛnsɪtʌɪz/