vesicle

• a small anatomically normal sac or bladderlike structure (especially one containing fluid)
• A bladderlike vessel
• A small bladderlike body in the substance of vegetable, or upon the surface of a leaf
• A small, and more or less circular, elevation of the cuticle, containing a clear watery fluid
• A cavity or sac, especially one filled with fluid
• A small convex hollow prominence on the surface of a shell or a coral
• 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

Report error with a word Suggest a new definition

You can also check definition for vesicle on wikipedia or google (link opens in new window)