reducer

English

Etymology

Etymology tree

Old French reduireder.

Middle English reducen

English reduce

Proto-Indo-European *-eh₂

Proto-Indo-European *-os?

Proto-Indo-European *-o-

Proto-Indo-European *-so-

Proto-Indo-European *-eh₂so-

Proto-Indo-European *-yós

Proto-Indo-European *-eh₂s(i)yós

Proto-Italic *-āsijos

Proto-Italic *-āsios

Latin -āriusnom.

Latin -āriusbor.

Proto-Germanic *-ārijaz

Proto-West Germanic *-ārī

Old English -ere

Middle English -ere

▲

Latin -ārius

Old French -ierbor.

Middle English -er

English -er

English reducer

From reduce + -er.

Pronunciation

• (General American) IPA^(key): /ɹɪˈdusɚ/

• Audio (Southern England):

  (file)

Noun

reducer (plural reducers)

1. Something or someone that reduces.
   • 2018, Andrew Matheson, Murray Reid, Practical Beekeeping in New Zealand: The Definitive Guide, page 35:

     If a floorboard has deep risers, you should use an entrance reducer in winter, to help keep out mice […]

2. (chemistry) A reducing agent.
3. (hydraulics) 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 machine.
4. (photography) A liquid used in the process of developing a negative to reduce its darkness.
5. A component used to connect two things of different sizes.

   This reducer ring allows an E27 lampshade to be used on a B22 light fitting.

   1. (plumbing) A component used to connect two pipes of different bores.
6. (software) A function that takes state and action as arguments and returns the next state of the app.
7. (soccer) The reduction of the contribution to a football game of a more talented opponent by intimidation using a brutal tackle.
   • 2022 November 21, Barry Glendenning, “Live Feed: Senegal v Netherlands”, in The Guardian‎^[1], archived from the original on 3 December 2022:

     Koulibaly flattens Steven Bergwijn with a reducer from behind but avoids a booking. Bergwijn gets to his feet and blows his cheeks in frustration. I think that really hurt but he doesn’t want to show it.

Derived terms

• entrance reducer
• Farmer's reducer

Translations

something that reduces

• Bulgarian: редуктор (reduktor)
• Finnish: vähentäjä (fi), heikentäjä
• French: réducteur (fr) m
• German: Reduzierer m
• Spanish: reductor (es) m

reducing agent — see reducing agent

photography: developing liquid

• Catalan: rebaixador m
• Finnish: heikenne (fi)

plumbing component

• Finnish: supistaja (fi)
• German: Reduzierung (de) f
• Polish: złączka redukcyjna f

References

• (plumbing): reducer on Wikipedia.Wikipedia
• (software): Core Concepts: Redux

Anagrams

• Credeur, recured