equipollent
|e-quip-ol-lent|
/ɪˈkwɪpələnt/
equal in power/effect
Etymology
'equipollent' originates from Latin, specifically the word 'aequipollens', where 'aequi-' meant 'equal' and 'pollens' (from 'pollere') meant 'powerful/strong'.
'aequipollens' (Latin) passed into Late/Medieval Latin as 'equipollens' and was adopted into English (scholarly/technical usage) as 'equipollent' in the 17th–18th century.
Initially it meant 'equal in power or strength'; over time the sense broadened slightly to 'equivalent' in general use and to a technical meaning 'logically or mathematically equivalent' in formal contexts.
Meanings by Part of Speech
Adjective 1
equal in power, effect, or significance; having the same force or efficacy.
The two remedies proved to be equipollent in relieving the symptoms.
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Adjective 2
(logic/mathematics) Equivalent in consequence or value; yielding the same result or conclusion.
In this context the two propositions are equipollent: each implies the other.
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Last updated: 2025/10/18 09:32