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ep·ar·te·ri·al .ep-är-'tir-ē-əl adj situated above an artery specif of or relating to the first branch of the right bronchus
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adj.
situated on or above an artery.
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ep·ar·te·ri·al (ep″ahr-teґre-əl) [epi- + arterial] over an artery; applied especially to the first branch of the right primary bronchus which is so situated.Medical dictionary. 2011.