rotativism
/ˈrəʊtətɪvɪz(ə)m/ /rə(ʊ)ˈteɪtɪvɪz(ə)m/Chiefly historical
noun
A system whereby different political parties rotate in office according to a pre-arranged plan rather than by electoral mandate, especially in Portugal in the second half of the 19th cent.
Origin
Early 20th century; earliest use found in The Sun. From rotative + -ism, probably after Portuguese rotativismo.