1. One who introduces and guides discussion and audience participation during a panel, colloquy, or forum. Sometimes called a facilitator. 2. An advisor to an educational course team. That advisor may represent the body that is validating the course or...

In a NUCLEAR REACTOR, a material used to control the speed (and thereby the energy) of NEUTRONS emitted during the process of NUCLEAR...

Moderator, a Latin word for manager, ruler, director, can refer...