Vacuole definition

văkyo͝o-ōl
Frequency:
(biol.) A fluid-filled cavity within the cytoplasm of a cell, surrounded by a membrane that usually encloses food, water, or air.
noun
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A cavity within the cytoplasm of a cell, surrounded by a single membrane and containing fluid, food, or metabolic waste. Vacuoles are found in the cells of plants, protists, and some primitive animals. In mature plant cells, there is usually one large vacuole which occupies a large part of the cell's volume and is filled with a liquid called cell sap. The cell sap stores food reserves, pigments, defensive toxins, and waste products to be expelled or broken down. In the cells of protists, however, there may be many small specialized vacuoles, such as digestive vacuoles for the absorption of captured food and contractile vacuoles for the expulsion of excess water or wastes.
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A membrane-bound organelle in the cytoplasm of most cells, especially plant cells, containing water and dissolved substances such as salts, sugars, enzymes, and amino acids.
noun
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A small extracellular cavity or space within tissues.
noun
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A membrane-bound organelle in the cytoplasm of most cells, especially plant cells, containing water and dissolved substances such as salts, sugars, enzymes, and amino acids.
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A small extracellular cavity or space within tissues.
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(cytology) A large membrane-bound vesicle in a cell's cytoplasm.
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Other Word Forms

Noun

Singular:
vacuole
Plural:
vacuoles

Origin of vacuole

  • French from Latin vacuus empty vacuum

    From American Heritage Dictionary of the English Language, 5th Edition

  • Latin vacuolum, diminutive form of vacuum.

    From Wiktionary