- A vacuole is a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance. Sometimes a single vacuole can take up most of the interior space of the plant cell.
Definition from: Talking Glossary of Genetic Terms from the National Human Genome Research Institute
- 1: A small cavity or space in the tissues of an organism containing air or fluid.
2: A cavity or vesicle in the cytoplasm of a cell containing fluid.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
See also Understanding Medical Terminology.