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    | ETHICAL:   | 
    the
      originators of the Riverworld; mysterious group of humans, self-named for
      their moral superiority;  | 
  
  
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    | GRAIL:   | 
    common
      name for the bucket-shaped, metal container that is the source of food for
      Riverdwellers; computer machinery in the bottom converts energy from the
      grailstones into food and other necessaries based on pre-recorded cultural
      menus for the individual; indestructible by means available to the
      Riverdwellers; lidded, only can be opened by the owner (see FREE
      GRAIL, GRAILSTONE) | 
  
  
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    | GRAILSTONE:    | 
    flat,
      table-shaped structure that sit at the both banks of the river, spaced
      every mile; five feet high, with a
      diameter of fifty feet, appears to be made out of red-flecked granite; three
      times a day, it flares with roaring electrical energy, deafening and
      startling; if a grail is placed on one of the 700 depressions, it will be
      unharmed by the flames and convert the raw energy into edible food; appear
      to be somehow linked to the process of translation (see GRAIL, TRANSLATION)
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    | FREE
      GRAIL:     | 
    a
      GRAIL that can be used by anyone; Riverdwellers found a free grail already
      on the GRAILSTONE on Resurrection Day, presumably to show them how the
      grails work (see GRAIL,
      GRAILSTONE,
      RESURRECTION
      DAY)   | 
  
  
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    | RESURRECTION
      DAY:   | 
    the
      first day of life on the Riverworld; the day when all humans who died
      before 1983 found themselves naked, hairless and physically 25 years old,
      with a GRAIL beside them, on the banks of the River   | 
  
  
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    | TRANSLATION:   | 
    the
      process by which Riverdwellers are resurrected at a random location on the
      banks, always near a GRAILSTONE; occurs after death on the Riverworld,
      always in the morning of the day following physical death; translatees
      always appear hairless and naked, with a new GRAIL and a few KILTCLOTHS
      (see also WATHAN,
      GRAILSTONE,
      KILTCLOTH)   | 
  
  
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    | KILTCLOTH:   | 
    a
      short of cloth with magnetic fasteners; did not appear until the second
      day, forcing most Riverdwellers to become comfortable with nudity (see
      also RESURRECTION
      DAY) | 
  
  
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    | WATHAN:   | 
    a
      ball of tendrilous, colored energy that hovers invisibly above every
      person's head; the soul; holds all information about a person's life,
      including memory, personality and the condition of the physical body;
      inexorably drawn to only a body that matches the original in every way,
      will wonder the universe aimlessly until its body is resurrected for
      it   | 
  
  
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    | DREAMGUM:   | 
    hallucinogenic
      gum; causes users to have self-reflective dreams; used by the Church of
      the Second Chance in meditation rituals (see also CHURCH
      OF THE SECOND CHANCE)
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    | CHURCH
      OF THE SECOND CHANCE: 
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    a
      theology started by a man named Viro, based on the premise that the
      Riverworld is a second chance for humans to attain personal enlightenment;
      pacifist; apparently inspired by a visit by X, who instructed Viro to
      start the Church (see also 
      X) | 
  
  
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    | X: 
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    aka
      Ecks; Mysterious Stranger; a highly secretive agent working against
      the Ethicals, in order to save humanity from a terrible, unknown fate;
      contacted a number of the Riverdwellers (including Sir Richard Burton and
      Samuel Clemens) and urged them to find the headwaters of the River | 
  
  
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    | ESPERANTO: 
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    the
      common language spoken by most Riverdwellers; spread to the masses by the
      Church of the Second Chance  | 
  
  
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