vacuole

Noun
  1. A tiny cavity filled with fluid in the cytoplasm of a cell (synset 105454663)
    is a type of: bodily cavity, cavity, cavum - (anatomy) a natural hollow or sinus within the body
    is a part of: cell - (biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals

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