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1. A tube of small internal diameter; holds liquid by capillary action
   - capillary tube, capillary tubing
    
2. Any of the minute blood vessels connecting arterioles with venules
   - capillary vessel

1. Long and slender with a very small internal diameter
   "a capillary tube";
   - hairlike
    
2. Of or relating to hair

Derived forms: capillaries

See also: thin

Type of: blood vessel, tube, tubing

Part of: thermometer

Encyclopedia: Capillary