Definitions

1. noun

The external opening of the cloaca in birds, especially the anus.

“The veterinarian examined the bird’s uropygium to check for any signs of illness.”

2. noun

The external opening of the cloaca in reptiles.

“The herpetologist studied the uropygium of the snake to understand its unique characteristics.”

3. noun

The external opening of the cloaca in amphibians.

“The biologist observed the uropygium of the frog to analyze its digestive system.”