from The Century Dictionary.

  • noun A passageway or bridge constructed to carry one air-course over another, as in the ventilation of coal-mines.


Sorry, no etymologies found.


  • While I myself cannot get wildly enthusiastic about the possibility of visiting the moon, I do find it a source of constant wonder to be able to cross the Atlantic in sedate luxury, and in 5 hours; 15 years ago, the Atlantic air-crossing was still something of a protracted and uncomfortable adventure.

    Fifteen Years at the World Bank


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