Definition of photosensitizer in US English:

photosensitizer

(also photosensitiser)

noun

  • 1Chemistry and Biochemistry. A substance capable of initiating a chemical reaction by absorbing light energy and transferring it to a reactant.

  • 2Medicine. A substance that causes photosensitization.

Origin

Early 20th century; earliest use found in Science. From photo- + sensitizer.

Pronunciation

photosensitizer

/ˌfəʊtə(ʊ)ˈsɛnsɪtʌɪzə/