From The Collaborative International Dictionary of English v.0.48 [gcide]:
Capillary \Cap"il*la*ry\, n.; pl. Capillaries.
1. A tube or vessel, extremely fine or minute.
[1913 Webster]
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.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
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]
From WordNet (r) 3.0 (2006) [wn]:
capillary
adj 1: of or relating to hair
2: long and slender with a very small internal diameter; "a
capillary tube" [syn: capillary, hairlike]
n 1: a tube of small internal diameter; holds liquid by
capillary action [syn: capillary, capillary tube,
capillary tubing]
2: any of the minute blood vessels connecting arterioles with
venules [syn: capillary, capillary vessel]