operculum (noun)

1. In the underwater scene of the movie, the operculum of the fish was clearly visible, protecting its gill slits.

2. The designer created a unique dress inspired by the operculum of a gastropod, using it as a cover for the dress opening.

3. In the terrifying story, the monstrous creature had sharp teeth hidden behind its operculum, which it used to attack its victims.

4. The modern house design incorporated operculum-inspired elements, using hard flaps as covers for the windows in a unique and aesthetically pleasing way.