A person who practises or advocates infant baptism; specifically (usually with capital initial) a person who belongs to a Christian denomination which adheres to infant baptism.
Origin
Mid 17th century. From paedo- + baptist, after paedobaptism.
Definition of paedobaptist in US English:
paedobaptist
nounˌpiːdəʊˈbaptɪst
A person who practises or advocates infant baptism; specifically (usually with capital initial) a person who belongs to a Christian denomination which adheres to infant baptism.
Origin
Mid 17th century. From paedo- + baptist, after paedobaptism.