This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A small bladderlike cell or cavity.

n. Anatomy A small sac or cyst, especially one containing fluid.

n. Pathology A serum-filled blister formed in or beneath the skin.

n. Geology A small cavity formed in volcanic rock by entrapment of a gas bubble during solidification.

n. A membrane-bound compartment found in a cell.

n. A small bladder-like cell or cavity.

n. A small sac or cyst or vacuole, especially one containing fluid. A blister formed in or beneath the skin, containing serum. A bleb.

n. A pocket of embryonic tissue that is the beginning of an organ.

n. A small cavity formed in volcanic rock by entrapment of a gas bubble during solidification.

n. A bladderlike vessel; a membranous cavity; a cyst; a cell.

n. A small bladderlike body in the substance of a vegetable, or upon the surface of a leaf.

n. A small, and more or less circular, elevation of the cuticle, containing a clear watery fluid.

n. A cavity or sac, especially one filled with fluid.

n. A small convex hollow prominence on the surface of a shell or a coral.

n. A small cavity, nearly spherical in form, and usually of the size of a pea or smaller, such as are common in some volcanic rocks. They are produced by the liberation of watery vapor in the molten mass.

n. In petrography, a cavity in lava formed by the expansion of escaping gasbubbles, chiefly of steam.

n. Any small bladder-like structure, cavity, cell, or the like, in a body; a membranous or vesicular vessel or cavity; a little sac or cyst. Also vesicule.

n. A minute hollow sphere or bubble of water or other liquid.

n. a small anatomically normal sac or bladderlike structure (especially one containing fluid)

"Inside-outside transitions of phospholipids in vesicle membranes."

sac   

blister    anal vesicle    germinal vesicle    marginal    ovarian    seminal vesicles    chlorophyl vesicle    serous vesicle    allantoid vesicle    ophthalmic vesicle   

vesiculation    vesica    vesication   

dacryocyst    Golgi apparatus    liposome    blister    lacrimal sac    golgi complex    tear sac    bleb    Golgi body    follicle   

cyst    cell    bladder    bleb    pompholyx    bulla    blain    blister    follicle    vacuole   

prostatic    seminal    mammary    prostate    testis    ductal    utricle    follicular    medullary    bronchial