噴氣孔 [喷气－]

Jyutping pan3 hei3 hung2
Pinyin pēn qì kǒng

Definitions (Wiktionary)
  1. noun
    blowhole (spiracle on the top of the head through which cetaceans breathe)
  2. noun
    blowhole (vent for the escape of steam or other gas)