ejector

[ih-jek-ter]

e·jec·tor

[ih-jek-ter]
noun
1.
a person or thing that ejects.
2.
(in a firearm or gun) the mechanism that after firing throws out the empty cartridge or shell.
3.
Also called eductor. a device for inducing a flow of a fluid from a chamber or vessel by using the pressure of a jet of water, air, steam, etc., to create a partial vacuum in such a way as to entrain the fluid to be removed.
4.
any of various devices for removing work from a machine or die.

Origin:
1630–40; eject + -or2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Ejector is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
Collins
World English Dictionary
ejector (ɪˈdʒɛktə)
 
n
1.  a person or thing that ejects
2.  the mechanism in a firearm that ejects the empty cartridge or shell after firing

Collins English Dictionary - Complete & Unabridged 10th Edition
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