This is always the case in a decomposition reaction. Don't forget that!! Figuring out what the products are in decomposition is harder (maybe you'll think it's easier!!) because you will have to recognize several categories of decomposition reactions.
Geology. a small, usually spherical cavity in a rock or mineral, formed by expansion of a gas or vapor before the enclosing body solidified. Origin of vesicle.
Wiktionary(5.00 / 1 vote)Rate this definition: 1  vesicle(Noun) A membrane-bound compartment found in a cell. 2  vesicle(Noun) A small bladder-like cell or cavity. 3  vesicle(Noun) A small sac or cyst or vacuole, especially one containing fluid. A blister formed in or beneath the skin, containing serum. A bleb.