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noun, plural: cytosols

(1) The liquid component of the cytoplasm surrounding the organelles and other insoluble cytoplasmic structures in an intact cell where a wide variety of cell processes take place.

(2) The aqueous portion of the cytoplasm in an intact cell consisting of water, organic molecules and dissolved ions.


The cytosol serves as the site where many chemical reactions take place. In prokaryotes, it is where most metabolic reactions take place. In eukaryotes, it is where the organelles and other cytoplasmic structures are suspended.

Word origin: cyto- + sol(ution).
Related forms: cytosolic (adjective)


Compare: cytoplasm.

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