[ad. mod.L. artēriola, dim. of artēria ARTERY; cf. F. artériole.] A minute or ultimate artery.
1839–47. Todd, Cycl. Anat. & Phys., III. 989/2. The branchial artery … giving off arterioles to the branchial laminæ.
1878. Smithsonian Rep., 424. The arterioles of the muscles.
