Dilator or dilatator may refer to:

• Dilator (medical instrument), a surgical instrument or medical implement used to induce dilation, such as:
  • Cervical dilator
  • Rectal dilator
  • Vaginal dilator
• a pharmacological treatment used to induce dilation, such as:
  • Cervical dilation#Induced dilation in childbirth
  • Vasodilator
  • Bronchodilator
• A muscle which causes dilation of a part, such as:
  • Iris dilator muscle
  • Dilator naris muscle

See also

• Sound (medical instrument), a device to penetrate or enlarge a body passage
• Stent, a device to keep a body passage open

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