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arteriole Syllabification: ar·te·ri·ole
Pronunciation: /ärˈtirēˌōl/

Definition of arteriole in English:


A small branch of an artery leading into capillaries.
Example sentences
  • Considerable congestion of pulmonary arteries, arterioles, veins, venules, and alveolar capillaries accompanied by vascular engorgement was present in four cases.
  • Lesions present in the peritubular capillaries, arterioles and renal tubules were recorded.
  • These branches become smaller and are differentiated into three distinct regions: pulp arterioles, sheathed arterioles, and terminal capillaries.


Pronunciation: /ärˌti(ə)rēˈōlər/
Example sentences
  • It is divided into a number of lobules, each containing clusters of two distinct cell types together with arteriolar blood vessels and capillaries, nerve fibres, and a few autonomic ganglion cells.
  • External injury to the alveolar wall may be the counterpart of arteriolar smooth muscle injury.
  • This increase in water retention, together with contraction of arteriolar smooth muscle and increase in the rate and force of cardiac contraction, results in a rise in blood pressure.


Mid 19th century: from French artériole, diminutive of artère (see artery).

Definition of arteriole in:
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