ca ‧ pil ‧ la ‧ ry /kəˈpɪləri $ ˈkæpəleri/ BrE AmE noun ( plural capillaries ) [countable]
[ Date: 1600-1700 ; Language: French ; Origin: capillaire , from Latin capillaris , from capillus 'hair' ]
the smallest type of ↑ blood vessel (=tube carrying blood) in the body