#moderator.inhibitor  any substance used to slow down neutrons in nuclear reactors
  supertype:  #inhibitor  a substance that retards or stops an activity
  subtype:  #heavy_water  water containing a substantial proportion of deuterium atoms, used in nuclear reactors
  part of:  #nuclear_reactor__reactor  (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements

No statement uses or specializes #moderator.inhibitor; click here to add one.