blowhole

/ˈbloʊˌhoʊl/
noun
  1. A hole on the top of a whale's head through which it breathes and sprays water.
    • A whale's blowhole is actually a modified nostril.
    • The whale surfaced and shot water from its blowhole.
    • We watched the dolphin's blowhole open as it took a breath.
  2. A hole in a rock or cliff through which water or air is forced upward, often making a spray.
    • Tourists gathered to watch the blowhole erupt with a loud roar.
    • At high tide, the blowhole on the coast shoots water high into the air.
    • The blowhole formed naturally as waves eroded the cliff.
Synonyms
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