1. plural of epizoön; external parasites that live on the skin or outer surface of animals
Usage: technical; zoology; plural form

Examples

• The veterinarian examined the dog for epizoa such as fleas and ticks.
• Epizoa can cause irritation and disease in their host animals.
• Marine biologists study epizoa that attach to whales and other sea creatures.
• The presence of epizoa on livestock requires prompt treatment.
• Different species of epizoa have adapted to specific host animals.