Capillary

kap′il-a-ri, or ka-pil′a-ri, adj. as fine or minute as a hair: having a very small bore, as a tube.— n. a tube with a bore as fine as a hair: ( pl. ) the minute ve els that unite the veins and arteries in animals.— adj. Capillaceous (kap-i-lā′shi-us), hair-like, capillary.— n. Capillar′ity , a name given to certain phenomena which appear when open tubes, having a very small bore, are placed in ve els containing liquids—e.g., if placed in water, the level of the water in the tube will be above that of the general surface.— adj. Cap′illose , hairy. [L. capillaris — capillus , hair, akin to caput , the head, akin to Eng. Head .]