Medical Definition of reduce
transitive verb: to correct (as a fracture or a herniated mass) by bringing displaced or broken parts back into their normal positions
2a: to bring to the metallic state by removal of nonmetallic elements <reduce an ore by heat>b: deoxidizec: to combine with or subject to the action of hydrogend (1): to change (an element or ion) from a higher to a lower oxidation state (2): to add one or more electrons to (an atom or ion or molecule)
intransitive verb: to become diminished or lessened; especially : to lose weight by dieting
2: to become reduced <ferrous iron reduces to ferric iron>
3: to undergo meiosis
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