sensitizer

/ˈsɛnsətaɪzər/
noun
  1. A substance that makes something more reactive to light, heat, or other stimuli.
    • The lab used a sensitizer to make the material react to infrared radiation.
    • In photography, a sensitizer is added to the emulsion to increase its sensitivity to light.
    • Some sunscreens contain a chemical sensitizer that helps them absorb UV rays.
  2. A substance that causes an allergic reaction after initial exposure.
    • Nickel is a common sensitizer that can trigger contact dermatitis.
    • Poison ivy contains a powerful sensitizer that causes a rash in most people.
    • Workers handling epoxy resins must be careful, as these are strong sensitizers.
  3. A person or thing that makes others more aware of a particular issue.
    • She is a well-known sensitizer for mental health awareness in schools.
    • The documentary acted as a sensitizer, opening people's eyes to ocean pollution.
    • The workshop served as a sensitizer for the staff about unconscious bias.
Synonyms
What does "sensitizer" mean? | whatsthatwordmean | whatsthatwordmean