moderator has definitions from the fields of physics,nuclear physics
1
[ noun ] someone who presides over a forum or debate

Related terms

presiding_officer moderate

2
[ noun ] (physics,nuclear physics) any substance used to slow down neutrons in nuclear reactors
3
[ noun ] in the Presbyterian church, the officer who presides over a synod or general assembly

Related terms

presiding_officer

4
[ noun ] someone who mediates disputes and attempts to avoid violence

Related terms

mediator modifier chasten

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