bleb

noun

1. A bubble, such as in paint or glass.
2. A large vesicle or bulla, usually containing a serous fluid.

   “2008, Lin Her-Shyuan Lin, Adam C, Reynolds, 180: Filtering Blebs and Associated Problems, Frederick Hampton Roy, Frederick W. Fraunfelder, Frederick T. Fraunfelder (editors), Roy and Fraunfelder's Current Ocular Therapy, 6th Edition, page 340, Inflammation and scarring is a shared mechanism for chemical irritants, cryotherapy, laser thermotherapy, and autologous blood injection in the treatment of bleb dysesthesia, overfiltering blebs, and bleb leaks.”

   “Use of intraoperative antimetabolites is a risk factor for the development of a bleb leak. The mechanism of a bleb leak is thought to be as follows. Ischemic blebs are stretched and surrounded by heavily scarred tissue, which limits the ability of the aqueous to flow beyond the scarred tissue. The bleb expands locally, producing a tractional hole when the tissue overreaches its maximal stretch.”

3. An irregular bulge in the plasma membrane of a cell undergoing apoptosis.

   “Figure 4.20 reveals blebs on the surface of a bacterial cell. In many instances, these blebs are released from the cell into the surrounding media.”

   “2013, Louis Foucard, Xavier Espinet, Eduard Benet, Franck J. Vernerey, The Role of the Cortical Membrane in Cell Mechanics: Model and Simulation, Shaofan Li, Dong Qian (editors), Multiscale Simulations and Mechanics of Biological Materials, page 261, As the bleb grows (the growth time is on order of a minute), the actin cortex starts reassembling beneath the bleb membrane.”

   “A different approach is to use protrusions from the membrane, which are called blebs or blisters.[…]The absence of actin and tubulin from blebs formed on oocytes of Xenopus laevus clearly indicates the bleb membrane is detached from the cell cytoskeleton (Figure 3.29).”

4. A bubble-like inclusion of one mineral within another.

   “1974, George E. Stoertz, George E. Ericksen, Geology of Salars in Northern Chile, Geological Survey Professional Paper 811, page 32, Figure 23. […] The crust is underlain by silty sand, which is loosely cemented by a meshwork of gypsum crystals and contains blebs and small nodules of white ulexite (U).”

verb

1. To form, or cause the formation of, blebs.

   “And there, while big drops bow the grassy stems, / And bleb the withering hay with pearly gems,/ Dimple the brook, and patter in the leaves, / The song or tale ah hour's restraint relieves.”

   “Cells were blebbed by brief exposure (5-20 s) to 2 M NaCl-NaOH (pH 10.0) and then labeled with rhodamine-conjugated Fab fragments.”