Infant baptism is the practice of baptising infants or young children. In theological discussions, the practice is sometimes referred to as paedobaptism, or pedobaptism, from the Greek "pais" meaning "child". This can be contrasted with what is called "believer's baptism" (or credobaptism, from the Latin word "credo" meaning "I believe"), which is the religious practice of baptising only individuals who personally confess faith in Jesus, therefore excluding underage children. Opposition to infant baptism is termed catabaptism. Infant baptism is also called christening by some faith traditions.