aerostat

[air-uh-stat]
noun
any lighter-than-air aircraft, as a balloon or dirigible.

Origin:
1775–85; aero- + -stat

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World English Dictionary
aerostat (ˈɛərəˌstæt)
 
n
a lighter-than-air craft, such as a balloon
 
[C18: from French aérostat, from aero- + Greek -statos standing]
 
aero'static
 
adj
 
aero'statical
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences for Aerostat
Nowadays a balloon is an unpowered aerostat, whilst an airship is a powered one.
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