1. avoiding or repelled by light; showing an aversion to light
Usage: biology: used of organisms or cells
2. experiencing discomfort or pain in bright light
Usage: medicine: symptom of certain conditions

Examples

• Many deep-sea fish are photophobic and retreat to darker waters when exposed to light.
• The photophobic bacteria moved away from the light source in the laboratory experiment.
• Patients with migraine headaches often experience photophobic symptoms during an attack.
• Certain insects are photophobic and hide under rocks and logs during the day.
• The photophobic response in some organisms helps them survive in their natural habitats.