| Capillary 1. (n.) A minute vessel connecting arterioles and venules; fine; minute; very slender; having minute tubes or interspaces; having very small bore; as, the capillary vessels of animals and plants. 2. (a.) Pertaining to capillary tubes or vessels; as, capillary action. 3. (n.) A tube or vessel, extremely fine or minute. 4. (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. Thesaurus Entries aorta, arterial, arteriole, artery, blood vessel, bristlelike, carotid, cirrose, cirrous, fibered, fibroid, fibrous, flagelliform, flossy, funicular, gossamery, hairlike, hairy, jugular vein, ligamental, portal vein, pulmonary artery, pulmonary vein, ropy, silky, stringy, taeniate, taeniform, threadlike, thready, vascular, vein, veinlet, veinous, vena cava, venation, venose, venous, venule, vesicular, wiry |