noun (plural ~e) Date: 14th century the round usually lead seal attached to a papal bull, a hollow thin-walled rounded bony prominence, a large vesicle or blister
BULLA
Meaning of BULLA in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012