Definitions:

1. A membrane-bound organelle found in the cytoplasm of a cell. NOUN
   • The large central vacuole in plant cells stores water and helps maintain cell rigidity.
2. A tiny cavity filled with fluid in the cytoplasm of a cell. NOUN
   • In animal cells, vacuoles are smaller and often involved in storing nutrients or waste products.
3. Enclosed compartments which are filled with water containing inorganic and organic molecules including enzymes in solution, though in certain cases they may contain solids which have been engulfed. NOUN
   • Vacuoles can contain enzymes that break down macromolecules and cellular debris.

Synonyms:

• cytoplasmic inclusion
• storage granule
• vesicle