va·so·di·la·tor /-daɪˈletɚ/
  (a.)血管擴張的血管擴張神經
  va·so·di·la·tor /ˌvezoˈdaɪˌletɚ/ 名詞
  Vas·o·di·lat·or a.  Physiol. Causing dilation or relaxation of the blood vessels; as, the vasodilator nerves, stimulation of which causes dilation of the blood vessels to which they go. These nerves are also called vaso-inhibitory, and vasohypotonic nerves, since their stimulation causes relaxation and rest.
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  vasodilator
       n : a drug that causes dilation of blood vessels [syn: vasodilative]