[cap.il.lary] adj [F or L; F capillaire, fr. L capillaris, fr. capillus hair] (14c) 1 a: resembling a hair esp. in slender elongated form "~ leaves" b: having a very small bore "a ~ tube"
2: involving, held by, or resulting from surface tension "~ water in the soil"
3: of or relating to capillaries or capillarity
[2]capillary n, pl -lar.ies (1667): a capillary tube; esp: any of the smallest blood vessels connecting arterioles with venules and forming networks throughout the body