air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time  
<noun.artifact>
<noun.artifact>
| breather | 
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| schnorchel | 
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| schnorkel | 
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| snorkel | 
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| snorkel breather | 
 | 
lexical pointers
derivationally related form
semantic pointers
hypernym
part holonym