1. a tiny blood vessel that connects arteries and veins
Usage: anatomy
2. a very thin tube, especially one with a narrow internal diameter
Usage: technical

1. relating to or occurring in capillaries
Usage: anatomy
2. having a very small internal diameter like a hair
Usage: technical

Examples

• Blood flows from arteries through capillaries to veins.
• The capillaries in your skin help regulate body temperature.
• Scientists used a glass capillary to measure the tiny sample.
• Capillary action draws water up through the narrow tube.
• The capillary network in the lungs allows gas exchange.
• Water moves through soil by capillary forces.
• The thermometer contains mercury in a capillary tube.