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blowhole

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blowhole


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Blowhole  \Blow"hole`\,  n. 
  1.  A  cavern  in  a  cliff,  at  the  water  level,  opening  to  the 
  air  at  its  farther  extremity,  so  that  the  waters  rush  in 
  with  each  surge  and  rise  in  a  lofty  jet  from  the 
  extremity. 
 
  2.  A  nostril  or  spiracle  in  the  top  of  the  head  of  a  whale  or 
  other  cetacean. 
 
  Note:  There  are  two  spiracles  or  blowholes  in  the  common 
  whales,  but  only  one  in  sperm  whales,  porpoises,  etc 
 
  3.  A  hole  in  the  ice  to  which  whales,  seals,  etc.,  come  to 
  breathe. 
 
  4.  (Founding)  An  air  hole  in  a  casting. 
 
  From  WordNet  r  1.6  [wn]: 
 
  blowhole 
  n  1:  the  spiracle  of  a  cetacean  located  far  back  on  the  skull 
  2:  an  opening  for  the  escape  of  gas  or  air  [syn:  {vent},  {venthole}] 




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