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

• mundanities
• mundanity
• mundic
• mundics
• mundification
• mundifications
• mundificative
• mundified
• mundifies
• mundify
• mundifying
• mundungus
• mundunguses
• mung bean
• mung beans
• mungcorn
• munge
• munged
• munges
• munging
• mungo
• mungoose
• mungos
• Munich
• Munichism