moderator

• Nom désignant une personne ou une substance qui régule, notamment celui qui préside des débats ou des forums, sert de médiateur dans les disputes pour prévenir les conflits, un officier qui préside certaines assemblées ecclésiastiques, ou un matériau utilisé pour ralentir les neutrons dans les réacteurs nucléaires.

A noun referring to a person or substance that moderates, including one who presides over debates or forums, mediates disputes to prevent conflict, an officer presiding in certain church assemblies, or a material used to slow neutrons in nuclear reactors.

1. Nuclear reactor componentC1formalscientific

   A substance, such as heavy water or graphite, used to slow down fast neutrons in a nuclear reactor to sustain a chain reaction.

   Modérateur (nucléaire)

   • The reactor uses graphite as a moderator to control the fission process.
   • Heavy water is an effective moderator in certain types of nuclear reactors.
   • Engineers selected a specific moderator to optimize the reactor's performance.

2. Church officerC1formal

   In the Presbyterian church, the officer who presides over a synod or general assembly.

   Modérateur (dans une église presbytérienne)

   • The moderator opened the general assembly with a prayer.
   • She was elected as the moderator of the synod for the upcoming year.
   • The moderator's role is to guide the discussions and maintain order.

   Synonymeschairchairpersonpresidentpresiding officer

3. Debate or forum leaderB2formal

   A person who presides over a forum, debate, or discussion, ensuring it runs smoothly and fairly.

   modérateur

   • The moderator asked the panelists to keep their answers brief.
   • An experienced moderator kept the online forum civil and productive.
   • The debate moderator enforced the time limits for each speaker.

   Synonymesarbiterchairchairpersonfacilitatormediatorrefereeumpire

4. MediatorB2formal

   Someone who mediates disputes and attempts to prevent conflict or violence.

   médiateur

   • A neutral moderator was brought in to resolve the labor dispute.
   • The community moderator helped calm tensions between the two groups.
   • She acted as a moderator during the heated negotiation.

   Synonymesarbiterarbitratorconciliatorintermediarymediatornegotiatorpeacemakerrefereeumpire