equipollent
Concise Oxford English Dictionary © 2008 Oxford University Press:
equipollent /ˌiːkwɪˈpɒl(ə)nt, ˌɛkwɪ-/
▶adjective archaic equal in power, effect, or significance.
– derivatives
equipollence noun,
equipollency noun.
equipollence noun,
equipollency noun.
– origin ME: from OFr. equipolent, from L. aequipollent- ‘of equal value’, from aequi- ‘equally’ + pollere ‘be strong’.
'equipollent' also found in these Oxford entries:

