adelphic polyandry Directory References Discover 10 Famous Artworks by Leonardo da Vinci Where Is “Old Zealand”? Flags That Look Alike Why Is the Mona Lisa So Famous? What Comes After Terabyte? 20 Paintings You Have to Visit at the Museo del Prado in Madrid The 40th Anniversary of Star Wars Contents Ask the Chatbot a Question adelphic polyandry marriage custom Ask the Chatbot a Question Also known as: fraternal polyandry Learn about this topic in these articles:polyandry In polyandry…brothers, the institution is called adelphic, or fraternal, polyandry. Polygyny, the marriage of a man and two or more women at the same time, includes an analogous sororal form. Read More Britannica ChatbotChatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.