contractile vacuole

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contractile vacuole

n.
A membrane-bound organelle found in certain protists that pumps fluid in a cyclical manner from within the cell to the outside by alternately filling and then contracting to release its contents at various points on the surface of the cell. It functions in maintaining osmotic equilibrium.
References in periodicals archive ?
Contractile vacuoles form a functional link between certain intracellular parasites and free-living amoebae such as A.
Osmoregulation and contractile vacuoles of protozoa.
The movement of the fluid in gastrovascular systems of cnidarians could be driven by contractions of the epitheliomuscular cells (Van Winkle and Blackstone, 1997) or contractile vacuoles (Schierwater et al.
Hydroid stolonal contractions mediated by contractile vacuoles.