[ee-kwuh-pol-uh nt, ek-wuh-]


equal in power, effect, etc.; equivalent.
Logic. (of propositions, propositional forms, etc.) logically equivalent in any of various specified ways.


an equivalent.

Nearby words

  1. equiparation,
  2. equipartition,
  3. equipartition of energy,
  4. equipment,
  5. equipoise,
  6. equiponderance,
  7. equiponderate,
  8. equipotent,
  9. equipotential,
  10. equiprobabilism

Origin of equipollent

1375–1425; late Middle English < Latin aequipollent- (stem of aequipollēns) of equal value, equivalent to aequi- equi- + pollent- (stem of pollēns) able, present participle of pollēre to be strong

Related formse·qui·pol·lence, e·qui·pol·len·cy, noune·qui·pol·lent·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for equipollent

British Dictionary definitions for equipollent



equal or equivalent in significance, power, or effect
logic (of two propositions) logically deducible from each other; equivalent
maths logic (of two classes) having the same cardinality


something that is equipollent
Derived Formsequipollence or equipollency, nounequipollently, adverb

Word Origin for equipollent

C15: from Latin aequipollēns of equal importance, from equi- + pollēre to be able, be strong

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