Surrounding an artery.
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peri·ar·te·ri·al -är-'tir-ē-əl adj of, relating to, occurring in, or being the tissues surrounding an artery <\periarterial fibrosis>
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peri·ar·te·ri·al (per″e-ahr-tērґe-əl) near or around an artery.Medical dictionary. 2011.