Reducer

Re*du"cer

(-s?r), n. 1. One who, or that which, reduces.
[1913 Webster]

2. (Mach.) (a) A contrivance for reducing the dimensions of one part so as to fit it to another, as a reducing coupling, or a device for holding a drilling a chuck. (b) A reducing motion. (c) A reducing valve. (d) A hydraulic device for reducing pressure and hence increasing movement, used to transmit the load from the hydraulic support of the lower shackle to the lever weighing apparatus in some kinds of heavy testing machines.
[Webster 1913 Suppl.]

3. (Photog.) A reducing agent, either a developer or an agent for reducing density.
[Webster 1913 Suppl.]

4. (Chem.) a reducing agent.
[PJC]

 

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Wed 19th December 2018