aerostat

Then other lashings were made while the great aerostat plunged about like a wounded leviathan.
Illustrated Science for Boys and Girls|Anonymous
Then the aerostat, as the great bag is called, was unrolled and spread evenly over this.
Illustrated Science for Boys and Girls|Anonymous
There isn't as much of that aerostat left as would make a pocket-handkerchief or a walking-stick.
The Angel of the Revolution|George Griffith
Ten minutes later the aerostat was released from her moorings and rose swiftly and vertically into the air.
The Angel of the Revolution|George Griffith

I am going back to the aerostat, and I dare not leave you boys behind.
The Lost City|Joseph E. Badger, Jr.

British Dictionary definitions for aerostat

aerostat

/ (ˈɛərəˌstæt) /

noun

a lighter-than-air craft, such as a balloon

Derived forms of aerostat

aerostatic or aerostatical, adjective

Word Origin for aerostat

C18: from French aérostat, from aero- + Greek -statos standing

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012