noun🔗Share납막A waxy protuberance at the base of the upper beak in certain birds."The budgerigar's ceres was a vibrant blue, indicating it was a male ready to breed. "잉꼬의 납막은 생생한 파란색이었고, 이는 번식할 준비가 된 수컷임을 나타냈다.animalbirdanatomypartbiologyChat with AIVocabulary GamePractice Reading
