1. each of two parts into which a thing is or can be divided: formal, technical"the tax was to be delivered in two moieties"
▪ each of two social or ritual groups into which a people is divided, especially among Australian Aboriginal people and some North American Indians.formal, technical
▪ a part or portion, especially a lesser share.formal, technical
▪ a distinct part of a large molecule:formal, technical"the enzyme removes the sulphate moiety"
Word Originlate Middle English: from Old French moite, from Latin medietas ‘middle’, from medius ‘mid, middle’.