from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun One of the small terminal branches of an artery, especially one that connects with a capillary.

from The Century Dictionary.

  • noun A small artery.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun anatomy One of the small branches of an artery, especially one that connects with capillaries.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun one of the small thin-walled arteries that end in capillaries


from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin artēriola, diminutive of Latin artēria, artery, from Greek artēriā; see wer- in Indo-European roots.]


Help support Wordnik (and make this page ad-free) by adopting the word arteriole.


  • Pulmonary arteriole muscularization in lambs with diaphragmatic hernia after combined tracheal occlusion/glucocorticoid therapy.

    CHOP congenital diaphragmatic hernia publications 2010

  • And for a variety of reasons, Dr. Ridker decided that it had to be a process called inflammation, and what his basic research showed that the inflammation of the arteriole wall led to these clogs in these arteries becoming unstable, and they would burst, and that would cause a clot, and that would lead to a heart attack.

    CNN Transcript Aug 12, 2001 2001

  • Nor was he biting his nails over the fate of Shapirov and yet -- Tapping his own emotions, it occurred to him that having come thus far, having been miniaturized and finding himself in a small cerebral arteriole, he suddenly had an urge to check out his theories.

    Destination Brain Asimov, Isaac 1987

  • If you put them into reverse, we will just back out of this capillary and eventually -- not a very long eventually, either -- we will be back at the junction point and in the arteriole again.

    Destination Brain Asimov, Isaac 1987

  • The wall of the arteriole had been abraded by the injury and was not entirely blocked by the clot which embraced the section of nerve fibers and cells tightly.

    Fantastic Voyage Asimov, Isaac, 1920- 1966

  • The ship pulled downward, crashed through the arteriole wall, missed the nerve by a hand's breath and lunged downward into a forest of dendrites; catching and breaking free and catching again, until it lay here, a bubble of metal, entangled in thick, smooth fibers.

    Fantastic Voyage Asimov, Isaac, 1920- 1966

  • It had not been visible to Grant's eyes, at least until it had been pointed out, but now that the black arrow delicately marked out its limits, Grant could see it a small solid nodule plugging an arteriole.

    Fantastic Voyage Asimov, Isaac, 1920- 1966

  • They are most frequently found surrounding the arteriole, which thus seems to tunnel them, but occasionally they grow from one side of the vessel only, and present the appearance of a sessile bud growing from the arterial wall.

    XI. Splanchnology. 4g. The Spleen 1918

  • Fig. 19-9 sensory nerve ending living epidermal cells dead cell layer sebaceous gland capillaries arteriole venule hair follicle muscle (pulls hair upright) sweat gland hair shaft epidermis dermis subdermal connective and adipose tissue capillary bed

    Recently Uploaded Slideshows DocWithers 2010

  • Ang II also mediates the vasoconstriction of the afferent arteriole, and has a markedly greater effect on it than the efferent arteriole; the result is that glomerular hydrostatic pressure is augmented, and the GFR is maintained.

    Conservapedia - Recent changes [en] 2009


Log in or sign up to get involved in the conversation. It's quick and easy.