n. An ornament in the form of a capsule or locket, in use among the ancient Romans, who adopted it from the Etruscans.n. A seal attached to a document.n. Any ornament of rounded form, especially if suspended, such as those which are attached by small chains to the Hungarian crown.n. In pathology, a bleb or portion of epidermis raised by the extravasation of a transparent watery fluid, as in erysipelas, etc.n. In anatomy, an inflated portion of the bony external meatus of the ear, forming a more or less well-marked prominence on each side at the base of the skull of many animals, usually constituted by a bulbous tympanic bone. Also called bulla ossea. See extract.n. [capitalized] A genus of tectibranchiate (or pleurobranchiate) gastropods, to which very different limits have been assigned.