Ejector

n. person or thing which ejects; device which releases or expels

An injector or ejector is a pump-like device that uses the Venturi effect of a converging-diverging nozzle to convert the pressure energy of a motive fluid to velocity energy which creates a low pressure zone that draws in and entrains a suction fluid and then recompresses the mixed fluids by converting velocity energy back into pressure energy. The motive fluid may be a gas or a liquid. The entrained suction fluid may be a gas, a liquid, a slurry, or a dust-laden gas stream.
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Noun
1. a person who ousts or supplants someone else
(synonym) ouster
(hypernym) person, individual, someone, somebody, mortal, human, soul
2. a mechanism in a firearm that ejects the empty shell case after firing
(synonym) cartridge ejector
(hypernym) mechanism
(part-holonym) gun
(derivation) expel, eject, chuck out, exclude, throw out, kick out, turf out, boot out, turn out

n. ejector, person or thing which ejects; device which releases or expels

(n.)
One who, or that which, ejects or dispossesses.
  

(n.)
A jet jump for lifting water or withdrawing air from a space.