ecumenicism
[ ek-yoo-men-uh-siz-uh m or, esp. British, ee-kyoo- ]
/ ˌɛk yʊˈmɛn əˌsɪz əm or, esp. British, ˌi kyʊ- /
noun
ecumenicalism; ecumenism.
Origin of ecumenicism
First recorded in 1960–65;
ecumenic(al) +
-ism