a. - Resembling a hair; fine; minute; very slender; having minute tubes or interspaces; having very small bore; as, the capillary vessels of animals and plants.
a. - Pertaining to capillary tubes or vessels; as, capillary action.
n. - A tube or vessel, extremely fine or minute.
n. - A minute, thin-walled vessel; particularly one of the smallest blood vessels connecting arteries and veins, but used also for the smallest lymphatic and biliary vessels.