Bleb

n. bubble

For the cytoplasmic extension present during apoptosis please see Bleb (cell biology) In medicine, bleb is a large blister filled with serous fluid. Blebs can form in a number of tissues due to different pathologies, including frostbitten tissues, and as a cause of spontaneous pneumothorax. In the lungs, a bleb is a collection of air within the layers of the visceral pleura. In ophthalmology, blebs may be formed intentionally in the treatment of glaucoma.
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Bleb a large flaccid vesicle, usually at least 1 cm. in diameter. bleb n. A large flaccid vesicle. bleb a large flaccid vesicle, usually at least 0. [more]Bleb - Community and Resources

Noun
1. (pathology) an elevation of the skin filled with serous fluid
(synonym) blister, bulla
(hypernym) vesicle, cyst
(hyponym) water blister
(classification) pathology

(n.)
A large vesicle or bulla, usually containing a serous fluid; a blister; a bubble, as in water, glass, etc.