1. substances that cause an allergic reaction or increased sensitivity when a person is exposed to them
Usage: medical; chemistry
2. chemicals that make photographic materials more responsive to light
Usage: photography; technical

Examples

• Common sensitizers include nickel, latex, and certain fragrances.
• Workers in the factory must wear gloves to avoid contact with chemical sensitizers.
• The dermatologist tested her skin for various sensitizers to identify the cause of her rash.
• Photographic sensitizers help improve the quality of black and white film development.
• Many people develop allergies to sensitizers found in cosmetics and cleaning products.
• The lab uses special sensitizers to enhance the light sensitivity of their imaging plates.