capillary

American  

[kap-uh-ler-ee] / ˈkæp əˌlɛr i /

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.

   1. pertaining to capillarity.

   2. of or relating to the apparent attraction or repulsion between a liquid and a solid, observed in capillarity.

4. Anatomy. pertaining to a capillary or capillaries.

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noun

plural

capillaries

1. Anatomy. one of the minute blood vessels between the terminations of the arteries and the beginnings of the veins.

2. Also called capillary tube.  a tube with a small bore.

capillary British  

/ kəˈpɪlərɪ /

adjective

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

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noun

1. anatomy any of the capillary blood vessels

2. a fine hole or narrow passage in any substance

capillary Scientific  

/ kăp′ə-lĕr′ē /

1. 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.

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capillary Cultural  

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

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Discover More

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.

Other Word Forms

• intercapillary
  adjective
• noncapillary
  adjective

Etymology

Origin of capillary

1570–80; capill ( ar ) (obsolete, < Latin capillāris pertaining to hair, equivalent to capill ( us ) hair + -āris -ar ¹ ) + -ary

Explanation

You are probably most familiar with the word capillary as a minute vessel that transports blood to larger vessels in the body, but a capillary can actually mean any tiny tubelike device that moves a liquid from point to point. Capillary comes from the Latin word capillaris, meaning "of or resembling hair." The meaning stems from the tiny, hairlike diameter of a capillary. While capillary is usually used as a noun, the word also is used as an adjective, as in "capillary action," in which a liquid is moved along — even upward, against gravity — as the liquid is attracted to the internal surface of the capillaries.

Example Sentences

Capillary stalling is believed to increase with age and has been observed in models of Alzheimer's disease.

From Science Daily • Mar. 28, 2024

Capillary forces hold sand grains together initially, but capillary water will eventually evaporate, particularly on a windy day.

From Scientific American • Aug. 23, 2022

All 93 bunkers were rebuilt from the floor up, using the Capillary Concrete brand of bunker liner, which incorporates a layer of gravel coated with a polymer for drainage.

From Golf Digest • Jan. 1, 2020

Capillary action can also occur when one end of a small diameter tube is immersed in a liquid, as illustrated in Figure 10.20.

From Textbooks • Feb. 14, 2019

Capillary resistance, however, may and usually does lessen the theoretical pressure so figured.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)

Related Words

• hair
• lode
• nerve
• seam
• stripe