From Longman Dictionary of Contemporary Englishmoietymoi‧e‧ty /ˈmɔɪəti/ noun (plural moieties) [countable] law or literarySCLAL a half share
Examples from the Corpus
moiety• It was not possible to ascertain directly how many halogen moieties had ended up on the football.• Controversy exists as to the nature of the toxic moiety within gliadin.• Experimental evidence later suggested that chloride was the actively transported moiety and that sodium followed passively.Origin moiety (1400-1500) Old French moité, from Late Latin medietas, from Latin medius “middle” 