vacuole

n. cavity filled with fluid in the cytoplasm of a cell; cavity in the tissue

Vacuoles are found in the cytoplasm of most plant cells. Vacuoles are membrane-bound compartments within some eukaryotic cells that can serve a variety of secretory, excretory, and storage functions. Vacuoles and their contents are considered to be distinct from the cytoplasm, and are classified as ergastic according to some authors. Vacuoles are especially conspicuous in most plant cells.
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Noun
1. a tiny cavity filled with fluid in the cytoplasm of a cell
(hypernym) cavity, bodily cavity, cavum
(part-holonym) cell

n. vacuole, cavity filled with fluid in the cytoplasm of a cell; cavity in the tissue

(n.)
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 protoplasm.