cir·cum·ci·sion 
(sûr′kəm-sĭzhən)
(sûr′kəm-sĭzhən)n.
1. The act of circumcising.
2. A religious ceremony in which a boy or man is circumcised.
3. Circumcision Christianity A feast observed on January 1 celebrating the circumcision of Jesus. Used with the.