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1. 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.
2. A small extracellular cavity or space within tissues.
[French, from Latin vacuus, empty; see vacuum.]
vac′u·o′lar (-ō′lər, -lär′) adj.
vac•u•o•la•tion(ˌvæk yu əˈleɪ ʃən, -yəˈleɪ-)
1. the formation of vacuoles.
2. the state of being vacuolate.
3. a system of vacuoles.