BULLA Meaning of BULLA in English [bul.la] n, pl bul.lae (14c) 1 [ML]: the round usu. lead seal attached to a papal bull 2. [NL, fr. L]: a hollow thin-walled rounded bony prominence 3: a large vesicle or blister Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012