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blimp Pronunciation (blmp)
1. A nonrigid, buoyant airship.
Originally posted by sardion2000
The proper term is "Aerostat."
An aerostat is a tethered or moored balloon often shaped like an airship and usually filled with helium. Aerostats differ from airships and balloon (aircraft) in that airships and balloons are both free flying whereas aerostats are tied to the ground.
The term "aerostat" is sometimes informally used to refer to any lighter than air aircraft. However, in modern technical usage, it refers only to moored balloons