| Answer | Crossword Clue |
|---|---|
| obturator | a structure or device that closes a cavity |
| obturators | OBTURATOR, a structure or device that closes a cavity |
| operculum | A structure that closes or covers an aperture, in particular |
| fastening | A device that closes or secures something |
| fastenings | A device that closes or secures something |
| shutters | A device that opens and closes to expose the film in a camera |
