Blowhole

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Blowhole may refer to:

  • Blowhole (biology), the hole at the top of a whale or other cetacean's head, homologous with a nostril
  • Blowhole (geology), a hole at the inland end of a sea cave through which waves funnel up and out
  • Blowhole (metallurgy), an internal hole or defect in a cast metal product.

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