blowhole
noun [ C ] uk/ˈbləʊ.həʊl/ us/ˈbloʊ.hoʊl/
（鲸的）鼻孔，喷水孔
an opening in the top of the head of a whale (= very large sea mammal), through which it breathes
geology specialized吹蚀穴
a hole in the ground that connects to a cave opening into the sea