Elizabethan collar

Elizabethan collar (plural Elizabethan collars)

1. A protective medical device worn by an animal, usually a cat or dog, shaped like a truncated cone, to prevent the animal from biting or licking at its body or scratching at its head or neck while wounds or injuries heal.
2. A fluted frill worn at the neck; a ruff.

• (protective device for animal): buster collar, cone of shame, E-collar, pet cone, pet lamp-shade