Definition of equipollent in US English:



  • Equal or equivalent in power, effect, or significance.

    • ‘Given the plane, he called two line segments equipollent if they are parallel, of equal lengths, and equally directed.’
    • ‘We shall consider an equipollent vector field with a given vector.’
    • ‘But the evidence against doing so is at least equipollent: Bayle claims, repeatedly and unequivocally, to be a believer.’
    • ‘Bellavitis then defines the ‘equipollent sum of line segments’ and obtains an ‘equipollent calculus’ which is essentially a vector space.’
    • ‘An equipollent system is the forces and moments that will replace the original set.’


Late Middle English: from Old French equipolent, from Latin aequipollent- ‘of equal value’, from aequi- ‘equally’ + pollere ‘be strong’.