LIGHTER-THAN-AIR
Meaning of LIGHTER-THAN-AIR in English
ˈ ̷ ̷ ̷ ̷ ̷ ̷| ̷ ̷ adjective
: of less weight than the air displaced — used of aircraft
Webster's New International English Dictionary.
Новый международный словарь английского языка Webster.
2012