get·ter (g t  r)n. A material added in small amounts during a chemical or metallurgical process to absorb impurities. |
getter [ˈgɛtə]
n
1. a person or thing that gets
2. (Physics / General Physics) a substance, usually a metal such as titanium, evaporated onto the walls of a vacuum tube, vessel, etc., to adsorb the residual gas and lower the pressure
vb
(Physics / General Physics) (tr) to remove (a gas) by the action of a getter
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