Protestantism; specifically (in the 17th cent.) the system of the reformed Church of England, as distinguished from Catholicism, Presbyterianism, and Puritanism. Now rare.
Origin
Mid 16th century. From Protestant + -cy; compare -ancy.
Definition of Protestancy in US English:
Protestancy
nounˈprɒtɪst(ə)nsi
Protestantism; specifically (in the 17th cent.) the system of the reformed Church of England, as distinguished from Catholicism, Presbyterianism, and Puritanism. Now rare.
Origin
Mid 16th century. From Protestant + -cy; compare -ancy.