Donates electrons, reduces other substances.

Substances that donate electrons readily.

Sugar that can donate electrons.

A reducing atmosphere is an atmospheric condition in which oxidation is prevented by absence of oxygen and other oxidizing gases or vapours, and which may contain actively reductant gases such as hydrogen, carbon monoxide, methane and hydrogen sulfide that would be readily oxidized to remove any free oxygen.

Controls and lowers fluid pressure.

Eating plan to lose weight.

(chemistry) The part of a flame that has an excess of fuel and is capable of reducing something that it is in contact with

Device for smelting or refining metal.

Lens that shrinks visual images.

Demotion to a lower rank.