preen gland (noun)

1. In the cartoon, the bird character frequently uses its preen gland to keep its feathers clean and shiny.

2. In the anime series, the main character has a pet bird with a highly developed preen gland.

3. In the science fiction novel, the genetically modified bird species have preen glands that produce a unique substance with extraordinary properties.

4. In the horror movie, the villain uses the secretions from the preen gland of birds to create a deadly potion.