blowhole

Noun
  1. The spiracle of a cetacean located far back on the skull (synset 105257902)
    is a type of: spiracle - a breathing orifice
    is a part of: blower, cetacean, cetacean mammal - large aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whales; dolphins; porpoises; narwhals
  2. A hole for the escape of gas or air (synset 104533536)
    is a type of: hole - an opening deliberately made in or through something
    subtypes: smoke hole - a vent (as in a roof) for smoke to escape
    is a part of: air duct, air passage, airway - a duct that provides ventilation (as in mines)
    same as: vent, vent-hole, venthole

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