cap·il·lar·y

[kap-uh-ler-ee] adjective, noun, plural cap·il·lar·ies.
adjective
1.
pertaining to or occurring in or as if in a tube of fine bore.
2.
resembling a strand of hair; hairlike.
3.
Physics.
a.
pertaining to capillarity.
b.
of or pertaining to the apparent attraction or repulsion between a liquid and a solid, observed in capillarity.
4.
Anatomy. pertaining to a capillary or capillaries.
noun
5.
Anatomy. one of the minute blood vessels between the terminations of the arteries and the beginnings of the veins.
6.
Also called capillary tube. a tube with a small bore.
00:10
Capillary is always a great word to know.
So is mucous. Does it mean:
pertaining to, consisting of, or resembling mucus.
extracellular proteins forming strong insoluble fibers, serving as connective tissue between cells

Origin:
1570–80; capill(ar) (obsolete, < Latin capillāris pertaining to hair, equivalent to capill(us) hair + -āris -ar1) + -ary

in·ter·cap·il·lar·y, adjective
non·cap·il·lar·y, adjective, noun, plural non·cap·il·lar·ies.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
capillary (kəˈpɪlərɪ) [Click for IPA pronunciation guide]
 
adj
1.  resembling a hair; slender
2.  (of tubes) having a fine bore
3.  anatomy of or relating to any of the delicate thin-walled blood vessels that form an interconnecting network between the arterioles and the venules
4.  physics of or relating to capillarity
 
n , -laries
5.  anatomy any of the capillary blood vessels
6.  a fine hole or narrow passage in any substance
 
[C17: from Latin capillāris, from capillus hair]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

capillary
1656, from L. capillaris "of hair," from capillus "hair" (of the head). Capillarity is recorded from 1830.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

capillary cap·il·lary (kāp'ə-lěr'ē)
adj.

  1. Of or relating to the capillaries.

  2. Relating to or resembling a hair; fine and slender.

n.
Blood capillary.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
capillary   (kāp'ə-lěr'ē)  Pronunciation Key 
Any of the tiny blood vessels that connect the smallest arteries (arterioles) to the smallest veins (venules). Capillaries form a network throughout the body for the exchange of oxygen, metabolic waste products, and carbon dioxide between blood and tissue cells.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
capillary [(kap-uh-ler-ee)]

A thin tube, such as a blood vessel or a straw, through which fluids flow.

Note: The interaction between the fluid and the vessel walls produces a force that can lift the fluid up into the tube, a phenomenon known as capillary action.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
At the water surface, where capillary waves are spreading the longitudinal
  waves exists on both lower, both higher wavelengths.
From these branches a minute capillary plexus is given off, which does not
  extend beyond the inner nuclear layer.
The nasal cavity has extensive capillary plexuses in the mucosa and submucosa.
Capillary rise into inter-filament gaps must be overcome in addition to
  individual filament wetting.
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