| 单词 | bulla |
| 释义 | bulla /bool"euh, bul"euh/, n. , pl. bullae /bool"ee, bul"ee/. 1. a seal attached to an official document, as a papal bull. 2. an ancient Roman pendant, consisting of a rounded box containing an amulet. 3. Pathol. a large vesicle. 4. Zool. a blisterlike or bubblelike prominence of a bone, as that of the tympanic bone in the skull of certain mammals. [1840-50; < L: bubble, also stud, boss, knob (whence ML bulla official seal)] |
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