Celebrate National Cancer Registrars Week – April 6 – 10, 2015 beacon (also known as Certified Tumor Registrar) noun bea·con ˈbē-kən CTR a strong light that can be seen from far away and that is used to help guide ships, airplanes, etc. a radio signal that is broadcast to help guide ships, airplanes, etc. someone or something (such as a country) that guides…