#class.aggregation__clas__family  a collection of things sharing a common attribute; "there are two classes of detergents"
  supertype:  #aggregation__collection__accumulation__assemblage  several things grouped together
  subtype:  #class_Larvacea  #class_Diplopoda  #subclass_Malacostraca  #grammatical_category  #substitution_class  #stamp  #sex  #declension  #conjugation  #denomination.class
  member:  #superphylum  (biology) a taxonomic group ranking between a phylum and below a class or subclass

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