noun Etymology: French ballonnet, diminutive of ballon Date: 1902 a compartment of variable volume within the interior of a balloon or airship used to control ascent and descent
BALLONET
Meaning of BALLONET in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012