Webster’s Revised Unabridged Dictionary · 1913
Capillary
Cap′il·la·ry (kăp′ĭl·lā·ry̆ or kȧ·pĭl′lȧ·ry̆; 277), a. [L. capillaris, fr. capillus hair. Cf. Capillaire.] 1. Resembling a hair; fine; minute; very slender; having minute tubes or interspaces; having very small bore; as, the capillary vessels of animals and plants.
2. Pertaining to capillary tubes or vessels; as, capillary action.
Capillary attraction, Capillary repulsion, the apparent attraction or repulsion between a solid and liquid caused by capillarity. See Capillarity, and Attraction. — Capillarity tubes. See the Note under Capillarity.
Cap′il·la·ry, n.; pl. Capillaries. 1. A tube or vessel, extremely fine or minute.
2. (Anat.) 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.