A gas, such as helium or hydrogen, that is used to produce buoyancy for e.g. balloons or airships.

The substance that creates the buoyancy of a balloon or other airship; normally hydrogen, helium or hot air.

Alternative form of weightlifting

present participle of lift a finger

(idiomatic) The most demanding part of an endeavour; work requiring the most effort, resources, or consideration. / Used other than figuratively or idiomatically: see heavy, lifting.

Alternative form of heavy lifting

(science fiction) A hypothetical process wherein a portion of a star's mass is removed, generally to serve as an energy source.

present participle of shop-lift

present participle of weight-lift

plural of lifting gas