ion propulsion

ion propulsion

noun
Rocketry. a projected type of propulsion for vehicles in outer space, the exhaust consisting of positive ions and negative electrons repelled from the vehicle by electrostatic forces, resulting in a very high exhaust velocity.
Also, ionic propulsion.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Ion propulsion is always a great word to know.
So is gobo. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a gadget; dingus; thingumbob.
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