From The Collaborative International Dictionary of English v.0.48:

Vacuole \Vac"u*ole\, n. [L. vacuus empty: cf. F. vacuole.]
   A small air cell, or globular space, in the interior of
   organic cells, either containing air, or a pellucid watery
   liquid, or some special chemical secretions of the cell
   [1913 Webster]

   Contractile vacuole. (Zool.) See under Contractile, and
      see Illusts. of Infusoria, and Lobosa.

   Food vacuole. (Zool.) See under Food, and see Illust. of
      [1913 Webster]
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