|  blowhole 
 
 1. the spiracle of a cetacean located far back on the skull
 • Hypernyms:
 spiracle
 • Part Holonyms:
 cetacean, cetacean mammal, blower
 2. a hole for the escape of gas or air
 • Syn:
 vent, venthole, vent-hole
 • Derivationally related forms:
 ventilate (for: vent)
 • Hypernyms:
 hole
 • Hyponyms:
 smoke hole
 • Part Holonyms:
 air passage, air duct, airway
 
 
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