Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Equal in force, power, effectiveness, or significance.
- adj. Logic Validly derived from each other; deducible.
- adj. Equivalent.
- n. An equivalent.
Century Dictionary and Cyclopedia
- Having equal power or force; equivalent.
- In logic, having the same meaning: applied to two propositions.
- In mathematics, equal and parallel.
Wiktionary
- adj. having equal power or force
- adj. logic able to be deduced from the other
- adj. equivalent
GNU Webster's 1913
- adj. Having equal power or force; equivalent.
- adj. (Logic) Having equivalent signification and reach; expressing the same thing, but differently.
Etymologies
- Middle English, from Old French, from Latin aequipollēns, aequipollent- : aequi-, equi- + pollēns, present participle of pollēre, to be powerful. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“Secondly, what clear sense and significancy can be given the words without the supplement of the conditional conjunction, or some other term equipollent thereunto, Mr”
The Doctrine of the Saints��� Perseverance Explained and Confirmed
“(A set is reflexive iff it is equipollent to one of its proper subsets; and two sets are equipollent with one another iff there exists a bijection, i.e., a one-to-one correspondence, between them.)”
“In this connection mention is especially often made of Bolzano's grasp of the “paradoxical” fact that an infinite set can and must be equipollent with one of its proper subsets, i.e., is”
“But the evidence against doing so is at least equipollent: Bayle claims, repeatedly and unequivocally, to be a believer.”
Fictionaut: This, About The Man I Met Out Here In Nearly Nowhere
“Only superstition is now so well advanced, that men of the first blood, are as firm as butchers by occupation; and votary resolution, is made equipollent to custom, even in matter of blood.”
“The word “equipollent” is out there, but is very rarely used.”
Intelligent Design explained: Part 2 random search - The Panda's Thumb
“[209] “Physical and moral” are taken to be terms, it seems, equipollent to”
The Doctrine of the Saints��� Perseverance Explained and Confirmed
“Though the term of “possibility” in the supposition, and “may” in the inference, seem to be equipollent, yet to render them of the same significancy as to the argument in hand, they must both be used in the same respect.”
The Doctrine of the Saints��� Perseverance Explained and Confirmed
“But there are words and phrases, both in the Old Testament and in the New, that are equipollent unto it, and express the matter or thing intended by it: as in the Old are, פּ ִדְי וֹ ן פּ ָדָה [Ps.xlix. 9], and כּ ֹפֶר.”
A Brief Declaration and Vindication of The Doctrine of the Trinity
“For, in a categorical syllogism the major proposition is not to be particular, or equipollent to a particular; for, from such a proposition, when any thing communicable to more is the subject of it, and is restrained unto one particular, nothing can be inferred in the conclusion.”
A Brief Declaration and Vindication of The Doctrine of the Trinity
Lists
These user-created lists contain the word ‘equipollent’.
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phrontistery - e
from phrontistery.info
ecclesiarchy, ecclesiastry, ecdemomania, echinuliform, echoism, echolalia, echopraxia, eclaircise, ?claircissement, eclat, ?clat, eclegme and 616 more...
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Logolepsy
"Luciferous Logolepsy is a collection of over 9,000 obscure English words. Though the definition of an 'English' word might seem to be straightforward, it is not. There exist so many adopted, deriv...
Anschauung, Areopagus, Argus, Briarean, Dei gratia, Dei judicium, Deo volente, Duecento, Foehn, Geflugelte Worte, Gegenschein, Hakenkreuz and 9230 more...
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Extrude
tchotchke, lugubrious, inspissated, fissiparous, vituperation, quondam, absolutisation, artisanal, funicular, sacerdotal, abstruse, circumspect and 38 more...
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Verba Dilecta
delectable, notate, pauciloquy, paucity, pauciloquent, paucify, interscapilium, uropygium, inferna, nota, equipollent, prepollent and 677 more...
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Faves
nepenthe, cupidity, anodyne, obdurate, doleful, obsolescent, quale, piquant, velleity, inchoate, disport, facile and 366 more...
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Archaic
Because they just don't make 'em like they used to.
comeling, circuition, assentment, advisement, accompts, apertness, larum, soothfastness, deperdition, marish, covin, tinct and 166 more...
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rememberers
prolix, ageusia, animadversion, anodyne, antic, arabesque, beadle, brachymetropia, colophon, desquamation, diaphoresis, diegesis and 3250 more...
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Words I've Found While Reading and Di...
see title
demijohn, eiderdown, aeolotropic, haptic, fecundity, mojibake, stochastic, nibble, homoskedastic, Entscheidungsproblem, hirsute, mutule and 68 more...
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Physics Words
Words I picked up in physics and other science/engineering classes!
per, lux, area, flux, steradian, lumen, penumbra, candela, hasp, adze, trestle, node and 27 more...
Tweets
Looking for tweets for equipollent.

rubah An equipollent system is kinda like an equivalent system except it doesn't adhere to the rigid body principle (the body has some flex mechanism or is not rigid).
One of those words that don't seem like they really would exist but here it is anyways. Oct 2, 2008