资料来源 : Webster's Revised Unabridged Dictionary (1913)

Bulla \Bul"la\, n.; pl. {Bull[ae]}. [L. bulla bubble. See {Bull}
   an edict.]
   1. (Med.) A bleb; a vesicle, or an elevation of the cuticle,
      containing a transparent watery fluid.

   2. (Anat.) The ovoid prominence below the opening of the ear
      in the skulls of many animals; as, the tympanic or
      auditory bulla.

   3. A leaden seal for a document; esp. the round leaden seal
      attached to the papal bulls, which has on one side a
      representation of St. Peter and St. Paul, and on the other
      the name of the pope who uses it.

   4. (Zo["o]l.) A genus of marine shells. See {Bubble shell}.

资料来源 : WordNet®

bullae
     See {bulla}

bulla
     n 1: (pathology) an elevation of the skin filled with serous
          fluid [syn: {blister}, {bleb}]
     2: the round leaden seal affixed to a papal bull
     [also: {bullae} (pl)]