- an air or gasbag compartment in a balloon or airship, used to control buoyancy and maintain shape.
Origin of ballonet
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ballonet
The magneto was run by a belt from one of the ballonet blowers.The War in the Air; Vol. 1
There are two noteworthy innovations in connection with the ballonet.
Special features is a "belly" of Para rubber in lieu of a ballonet.
The air pump, which should have pumped the ballonet full of air to keep the balloon rigid failed to work.
(p. 067) The balloon frame was divided into seventeen compartments, each of which held a ballonet filled with hydrogen gas.
- an air or gas compartment in a balloon or nonrigid airship, used to control buoyancy and shape
C20: from French ballonnet a little balloon
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