1. Any of the minute blood vessels connecting arterioles with venules
   "Capillary vessels allow for the exchange of nutrients and waste products between blood and tissues";
   - capillary vessel
    
2. A tube of small internal diameter; holds liquid by capillary action
   "The scientist used capillary tubes to collect small blood samples for analysis";
   - capillary tube, capillary tubing

1. Extremely fine or thin, like a hair
   "The spider's web was made of capillary strands"
    
2. Long and slender with a very small internal diameter
   "a capillary tube";
   - hairlike

Derived forms: capillaries

See also: thin

Type of: blood vessel, tube, tubing

Part of: thermometer

Encyclopedia: Capillary