Sentence examples for bulla from inspiring English sources
noun
A blister, vesicle, or other thin-walled cavity or lesion.
In more-advanced groups the basal elements are expanded into a cuplike receptacle, and the stalk is distally expanded into a bulla, or resonator.
Used since the 13th century as a seal for private letters and since the 15th century for papal briefs, it is one of two papal seals, the other being the leaden bull (bulla).
It is the only surviving species of the order Microbiotheria (family Microbiotheriidae) and differs from other living American opossums by having uncrowded lower incisors, a short attachment (symphysis) between the lower jaws, a complete bony capsule (auditory bulla) surrounding the middle ear, and a cloaca (a common opening for excretory and reproductive systems) under the tail.
The word bulla now refers to a round lead seal attached to an official document from the pope.
Pendants in the shape of a bulla are frequent in Roman necklaces, but there are also examples of cameos, intaglios, and gold coins mounted as pendants.
It is thought that the loop acted as a stopper for the bulla, which may have contained a liquid, presumably perfume.
In vesicular infections, the raised, erythematous leading edge of the rash contains vesicles (small fluid-filled blisters) or bullae (large fluid-filled blisters), which are a sign of acute inflammation.
Blisters are classified as vesicles if they are 0.5 cm (0.2 inch) or less in diameter and as bullae if they are larger.
The tarpons exhibit a further modification of the swim bladder, a pair of forward outgrowths that contact the auditory region of the braincase and are partially enclosed in bony bullae, a modification that presumably improves the sense of hearing.
Examples include urticaria bullosa, a rare type of allergic reaction characterized by the appearance of bullae or vesicles (large or small blisters); solar urticaria, produced by exposure to sunlight; and urticaria subcutanea, caused by swelling of the tissues underlying the skin.
Typically round or oval, bullae resemble a lion or satyr head.
