adj. & n.
--adj.
1. of or like a hair.
2 (of a tube) of hairlike internal diameter.
3 of one of the delicate ramified blood vessels intervening between arteries and veins.
--n. (pl. -ies)
1. a capillary tube.
2 a capillary blood vessel.
Phrases and idioms:
capillary action CAPILLARITY.
Etymology: L capillaris f. capillus hair