aer·o·stat (âr  -st t )n. An aircraft, especially a balloon or dirigible, deriving its lift from the buoyancy of surrounding air rather than from aerodynamic motion. [French aérostat : Greek  ero-, aero-; see aero- + Greek statos, standing; see stato-.]aer o·static, aero·stati·cal adj. |
aerostat [ˈɛərəˌstæt]
n
(Engineering / Aeronautics) a lighter-than-air craft, such as a balloon
[from French aérostat, from aero- + Greek -statos standing]
aerostatic , aerostatical adj
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