Definition of arteriole noun from the Oxford Advanced Learner's Dictionary

 

arteriole

 noun
noun
BrE BrE//ɑːˈtɪəriəʊl//
 
; NAmE NAmE//ɑːrˈtɪrioʊl//
 
(anatomy)
 
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a thin branch of an artery that leads off into capillaries Word Origin mid 19th cent.: from French artériole, diminutive of artère from Latin arteria, from Greek artēria, probably from airein ‘raise’.
See the Oxford Advanced American Dictionary entry: arteriole