aerostat

  1. Noun.  An aircraft, such as a dirigible or balloon, that derives its lift from buoyancy rather than from wings or rotors.
  2. Noun.  A moored balloon flown in a semi-permanent manner, as a border patrol monitoring balloon affixed at 18,000 feet (~6km).

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This entry was last updated on RefTopia from its source on 3/20/2012.