Definition of arteriole in English:



  • A small branch of an artery leading into capillaries.

    • ‘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.’
    • ‘Capillaries are formed as a complex system of branching blood vessels between arterioles and venules (microscopic veins) Those near the arteries are at a higher pressure than those near veins.’
    • ‘The bronchi and bronchioles did not show epithelial changes, and the pulmonary arteries and arterioles were normal in appearance.’


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