noun🔗ShareA covering flap in animals, such as a gill cover."The fish opened and closed its operculum, allowing it to breathe underwater. "organismanimalbiologyanatomyfishpartChat with AIVocabulary GamePractice Reading
noun🔗ShareThe lidlike portion of a moss sporangium or of a fruit that detaches to allow the dispersal of spores or seeds."The operculum on the moss capsule popped open, releasing a cloud of tiny spores into the air. "plantpartbiologyseedChat with AIVocabulary GamePractice Reading
noun🔗ShareA gum flap covering (part of) a partially erupted tooth, usually a wisdom tooth."The dentist carefully removed the operculum, allowing the wisdom tooth to finally emerge. "medicineanatomybodypartChat with AIVocabulary GamePractice Reading
noun🔗ShareA structure which serves as a cover or lid."The snail closed its operculum, sealing itself safely inside its shell. "partbiologyanatomystructureorganismChat with AIVocabulary GamePractice Reading
