The Collaborative International Dictionary of English v.0.48:

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]