Capillary 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.

Capillary a. : Pertaining to capillary tubes or vessels; as, capillary action.

Capillary n. : A tube or vessel, extremely fine or minute.

Capillary 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.

Example:
How to tell heatlhy gums and Capillary refill time in a rottie?

Taxonomy
capillaries, blood flow, branch, lungs, venules, blood vessels, fenestrated, free encyclopedia, Heart, arterioles, variables, cells, circulation, tissue, diaphragm, fluid movement, equation, filtration.

Defination from the web:
Capillary permeability can be increased by the release of certain cytokines, anaphylatoxins, or other mediators (such as leukotrienes, ... Ibn al-Nafis theorized a "premonition of the capillary circulation in his assertion that the pulmonary vein receives what comes out of the ...