say it: foh-toh-KEM-uh-kuhl
photochemical is an adjective meaning "of or relating to or produced by the effects of light on chemical systems". It carries one recorded sense.
of or relating to or produced by the effects of light on chemical systems
Definitions, synonyms and semantic relations for photochemical come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.