operculum /ō-pûrˈkū-ləm/

1. A cover or lid (botany)
2. The plate over the entrance of a shell (zoology)
3. The gill-cover of fishes
4. A coal-hole cover in a pavement

operˈcular adjective

Belonging to the operculum

• be at it like rabbits
• beatitude
• beatitudes
• beat music
• beatnik
• beatniks
• beat off
• beat one's brains
• beat one's brains out
• beat one's breast
• beat out
• be at pains
• beats
• beats me
• beat someone's brains out
• be at someone's discretion
• be at someone's throat
• beat someone to it
• beat the air
• beat the band
• beat the bounds
• beat the clock
• beat the drum
• be at the expense of
• beat the gun