Capillary \Cap"il*la*ry\ (k[a^]p"[i^]l*l[asl]*r[y^] or k[.a]*p[i^]l"l[.a]*r[y^]; 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. [1913 Webster] 2. Pertaining to capillary tubes or vessels; as, capillary action. [1913 Webster] {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}. [1913 Webster]