Random coining(?) post!
Assigned Multiple at Birth (AMuaB): a neoagab that denotes being assigned multiple at birth.
Assigned Plural at Birth (APlaB): a neoagab that denotes being assigned plural at birth.
Assigned System at Birth (ASyaB): a neoagab that denotes being assigned a system at birth.
All may be connected to being a protogenic plural, but they don’t have to be. Plural singlets may use APlaB and AMuaB.