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1. to restore to the normal place or relation of parts, as to reduce a fracture.
2. to undergo reduction.
3. to decrease in weight or size.


1. To place back into a preferred position; to perform reduction (1).
2. In chemistry, to initiate reduction (2).
[L. re-duco, to lead back, restore, reduce]


(rĭ-do͞os′, -dyo͞os′)
v. re·duced, re·ducing, re·duces
1. To bring down, as in extent, amount, or degree; diminish.
2. Chemistry
a. To decrease the valence of (an atom) by adding electrons.
b. To remove oxygen from (a compound).
c. To add hydrogen to (a compound).
d. To change to a metallic state by removing nonmetallic constituents; smelt.
3. Medicine To restore (a fractured or displaced body part) to a normal condition or position.
1. To become diminished.
2. Biology To undergo meiosis.

re·duc′er n.
re·duc′i·bil′i·ty n.
re·duc′i·ble adj.
re·duc′i·bly adv.


1. To perform reduction (1).
2. chemistry To initiate reduction (2).
[L. re-duco, to lead back, restore, reduce]


To restore a part of the body to its normal position or place, as in treating a fracture or dislocation. The repositioning of the bone or body part is called a reduction.
Mentioned in: Nasal Trauma

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References in periodicals archive ?
The polymer microstructure has important effects on the viscoelasticity of the fracturing fluid, but the relationship between the drag reduction mechanism and the microstructure of the polymer drag reducer has not yet been directly established [22].
Since then, Daniel said the reducers have done the job everyone expected them to do, moving coal with no issues.
In many cases reducer service life is represented indirectly, by overall performance of reducer in the machine in which it is installed.
the following values are obtained for the planetary reducers' efficiencies:
It is established that process of plasma liquid-phase iron reduction with application of gaseous reducers ensures production of a high-purity metal.
So, normal concentrations of stomach acid could suppress the organism's activity--until a person takes an acid reducer, Dial says.
Primary reducers offer some added safety to the operations of demo contractors who process mixed C&D, Andres adds.
It has been found in denitrifyers, sulfidogens, iron reducers, methanogenic consortia, and even an anoxygenic photosynthetic organism (Beller and Edwards 2000; Beller et al.
On the reducer end, however, Boston Gear mates two milled flats on the worm input shaft with a similarly shaped, broached bore in the coupling.
The design of primary reducers makes them well suited to handle a variety of materials, from metals to wood to concrete, without harming their vital components, a claim that many traditional high-speed grinders cannot boast.
* Dependable support of the hollow shaft reducer on the solid shaft while delivering maximum torque and shock load capability.
Emerson Power Transmission, Ithaca, NY, has introduced a new 64-page catalog featuring the Browning[R] TorqTaper Plus Shaft Mount Reducer.