#set.aggregation  a group of things of the same kind that belong together and are so used: "a set of books"; "a set of golf clubs"; "a set of teeth"
  supertype:  #aggregation__collection__accumulation__assemblage  several things grouped together
  subtype:  #dentition  #singleton.set  #pair  #triad  #quartette  #quintet.set  #sextet.set  #septet.set  #octet.set  #chess_set  #manicure_set  #sum  #set_intersection  #field_of_competitors  #field_of_horses  #character_field  #bracket.set  #conjugation.set  #suite.set  #choir.set  #core_group  #score.set  #threescore
  member:  #volume.publication  a publication that is one of a set of several similar publications; "the third volume was missing"; "he asked for the 1989 volume of the Annual Review"

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