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reduction

noun

  1. decrease, make less
  2. process of gaining electrons in a chemical reaction, decreasing oxidation state
  3. music term; arrangement or transcription of an existing score or composition in which complexity is lessened to make analysis, performance, or practice easier or clearer
  4. process of thickening and intensifying the flavor of a liquid mixture such as a soup, sauce, wine, or juice by simmering or boiling
  5. process of rewriting of an expression into a simpler form
  6. the transformation of one computational problem to another, used to show that the second problem is as difficult as the first
L5433 on Wikidata ↗

Wiktionary

Pronunciation: /ɹɪˈdʌk.ʃən/ / /ɹɪˈdak.ʃən/ / /ɹiˈdɑk.ʃən/

noun

Etymology: From Middle English reduccion, a borrowing from Old French reducion, from Latin reductiō, reductiōnem. Equivalent to reduce + -tion.

  1. The act, process, or result of reducing.

    With the cutting out of the previous recovery times for electrification work, curtailment of station times and acceleration, considerable reductions have been made in the overall schedules.

  2. The amount or rate by which something is reduced, e.g. in price.

    A 5% reduction in robberies

  3. A reaction in which electrons are gained and valence is reduced; often by the removal of oxygen or the addition of hydrogen.
  4. The process of rapidly boiling a sauce to concentrate it.
  5. The rewriting of an expression into a simpler form.
  6. A transformation of one problem into another problem, such as mapping reduction or polynomial-time reduction.
  7. An arrangement for a far smaller number of parties, e.g. a keyboard solo based on a full opera.
  8. A philosophical procedure intended to reveal the objects of consciousness as pure phenomena. (See phenomenological reduction.)
  9. A medical procedure to restore a fracture or dislocation to the correct alignment, usually with a closed approach but sometimes with an open approach (surgery).

    closed reduction

    open reduction and internal fixation

  10. A reduced price of something by a fraction or decimal.
  11. The ratio of a material's change in thickness compared to its thickness prior to forging and/or rolling.

    The final stage of thickness reduction (typically 90% from about 2mm to <0.2mm) is carried out by cold rolling.

  12. A religious settlement created during a mission by Spanish or Portuguese colonists with the intent of evangelizing Christianity to the local population.

    Spanish reductions in Mexico were common during the 18th century.