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Definitions of moderator
  1. noun
    any substance used to slow down neutrons in nuclear reactors
    type of:
  2. noun
    in the Presbyterian church, the officer who presides over a synod or general assembly
  3. noun
    someone who mediates disputes and attempts to avoid violence
  4. noun
    someone who presides over a forum or debate
Definition that contains moderator
  • graphite used as a lubricant and as a moderator in nuclear reactors
  • modifier a moderator who makes less extreme or uncompromising
  • bwr a nuclear reactor that uses water as a coolant and moderator; the water boils in the reactor core and the steam produced can drive a steam turbine
  • pwr a nuclear reactor that uses water as a coolant and moderator; the steam produced can drive a steam turbine
  • plumbago used as a lubricant and as a moderator in nuclear reactors
  • fast reactor nuclear reactor in which nuclear fissions are caused by fast neutrons because little or no moderator is used
  • thermal reactor a nuclear reactor in which nuclear fissions are caused by neutrons that are slowed down by a moderator
  • black lead used as a lubricant and as a moderator in nuclear reactors
  • moderatorship the position of moderator
  • boiling water reactor a nuclear reactor that uses water as a coolant and moderator; the water boils in the reactor core and the steam produced can drive a steam turbine
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