from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A small cavity in the cytoplasm of a cell, bound by a single membrane and containing water, food, or metabolic waste.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A large membrane-bound vesicle in a cell's cytoplasm.
from the GNU version of the Collaborative International Dictionary of English
- 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.
from The Century Dictionary and Cyclopedia
- n. A minute cell or cavity in the tissue of organisms.
- n. In anatomy, a minute space, vacuity, or interstice of tissue in which lymphatic vessels are supposed to originate.
- n. In zoology, any minute vesicle or vacuity in the tissue of a protozoan, as an amœba.
- n. In botany, a cavity of greater or less size within the protoplasmic mass of active vegetable cells, which is filled with water, or cell-sap as it is called.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a tiny cavity filled with fluid in the cytoplasm of a cell
French, from Latin vacuus, empty; see vacuum.(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin vacuolum, diminutive form of vacuum. (Wiktionary)