arteriola

from WordNet (r) 3.0 (2006)

arteriola
    n 1: one of the small thin-walled arteries that end in
         capillaries [syn: {arteriole}, {arteriola}, {capillary
         artery}]

from The Collaborative International Dictionary of English v.0.48

Arteriola \Ar*te`ri*o"la\, Arteriole \Ar*te"ri*ole\, n. [NL.
   arteriola, dim. of L. arteria: cf. F. art['e]riole.]
   A small artery with a muscular wall.
   [1913 Webster +PJC]