What do a.m. and p.m. stand for?


[ir-i-doo-suh-buh l, -dyoo-] /ˌɪr ɪˈdu sə bəl, -ˈdyu-/
not reducible; incapable of being reduced or of being diminished or simplified further:
the irreducible minimum.
incapable of being brought into a different condition or form.
  1. of or relating to a polynomial that cannot be factored.
  2. of or relating to a group that cannot be written as the direct product of two of its subgroups.
Origin of irreducible
1625-35; ir-2 + reducible
Related forms
irreducibility, irreducibleness, noun
irreducibly, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for irreducible
  • It can produce a sensation of irreducible foreignness.
  • Creativity comes about whenever you have a collision of ideas, forcing mutually irreducible notions to coexist in the same space.
  • But there is an irreducible psychological dimension to both crises and recoveries.
  • Some phenomena have an irreducible complexity that will defeat any big-idea effort at simplification.
  • Those cultures are irreducible to the regulatory environment or to economic behaviour.
  • There are other points of potentially irreducible contention.
  • By ignoring irreducible uncertainty, modern economics had gone fundamentally off course.
  • Those cultures are irreducible to the regulatory environment or to economic behaviour.
  • The irreducible complexity argument has been clearly and repeatedly shown to be flawed.
  • The scientific method is defined by the search for the irreducible truth.
British Dictionary definitions for irreducible


not able to be reduced or lessened
not able to be brought to a simpler or reduced form
  1. (of a polynomial) unable to be factorized into polynomials of lower degree, as (x² + 1)
  2. (of a radical) incapable of being reduced to a rational expression, as √(x + 1)
Derived Forms
irreducibility, irreducibleness, noun
irreducibly, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for irreducible

1530s, from assimilated form of in- (1) "not, opposite of" + reducible. Related: Irreducibly; irreducibility.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
irreducible in Medicine

irreducible ir·re·duc·i·ble (ĭr'ĭ-dōō'sə-bəl, -dyōō'-)

  1. Impossible to reduce to a desired, simpler, or smaller form or amount.

  2. Incapable of being made chemically simpler, or of being replaced, hydrogenated, or reduced in positive charge.

ir're·duc'i·bil'i·ty or ir're·duc'i·ble·ness n.
ir're·duc'i·bly adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for irreducible

Few English speakers likely know this word

Word Value for irreducible

Scrabble Words With Friends

Quotes with irreducible