1. small fluid-filled sacs or cavities in the body, especially those formed by or containing liquid
Usage: medical; biological
2. small membrane-bound compartments within cells that transport materials
Usage: biology; cellular biology

Examples

• The doctor examined the small vesicles that had formed on the patient’s skin.
• Chickenpox causes itchy vesicles to appear all over the body.
• The cell biologist studied how vesicles transport proteins within the cell.
• Synaptic vesicles release neurotransmitters at nerve endings.
• The rash consisted of tiny fluid-filled vesicles.
• Transport vesicles carry materials from one part of the cell to another.