Source : Webster's Revised Unabridged Dictionary (1913)

Arteriole \Ar*te"ri*ole\, n. [NL. arteriola, dim. of L. arteria:
   cf. F. art['e]riole.]
   A small artery.

Source : WordNet®

arteriole
     n : one of the small thin-walled arteries that end in
         capillaries [syn: {arteriola}, {capillary artery}]