#nickel  a US coin worth one twentieth of a dollar
  supertype:  #coin  a metal piece (usually a disc) used as money
     supertype:  #specie__coinage__mintage__metal_money__metalmoney  coins collectively
        supertype:  #currency  the metal or paper medium of exchange that is presently used
           supertype:  #medium_of_exchange__monetary_system  anything that is generally accepted as a standard of value and a measure of wealth in a particular country or region
              supertype:  #touchstone__standard__criterion__measure  a basis for comparison; a reference point against which other things can be evaluated; "they set the measure for all subsequent work"
                 supertype:  #reference_point__referencepoint__point_of_reference__reference  an indicator that orients you generally; "it is used as a reference for comparing the heating and the electrical energy involved"
                    supertype:  #indicator.signal  a signal for attracting attention
                       supertype:  #signal__sign__signaling  any communication that encodes a message; "signals from the boat suddenly stopped"
                          supertype:  #communication  something that is communicated between people or groups
                             supertype:  pm#description_content/medium/container__descriptioncontent/medium/container
                                supertype:  pm#non_spatial_object_that_is_not_an_attribute_or_quality_or_measure
                                   supertype:  pm#non_spatial_object__nonspatialobject  abstraction or description content/medium/container (a description medium that has some spatial feature is both instance of sumo#object and pm#non_spatial_object
                                      supertype:  pm#entity  something that can be "involved" in a situation
                                         supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                                      supertype:  cyc#intangible  The collection of things that are not physical -- are not made of, or encoded in, matter. Every cyc#Collection is a cyc#intangible (even if its instances are tangible), and so are some cyc#individuals.  Caution: do not confuse `tangibility' with `perceivability' -- humans can perceive light even though it's intangible--at least in a sense.
                                         supertype:  cyc#partially_intangible__partiallyintangible  The collection of things that either are wholly intangible (see cyc#Intangible) or have at least one intangible (i.e. immaterial) part (see cyc#intangibleParts). This includes intangible individuals, such as instances of cyc#Number-General  or cyc#Agreement, as well as non-individuals (all of which are intangible), i.e. instances of cyc#SetOrCollection.  It also includes things that have both tangible and intangible components (see cyc#CompositeTangibleAndIntangibleObject),  such as a printed copy of a newspaper (as its information content is intangible) or a person (as her mental states are intangible).
                                            supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                             supertype:  #social_relation  a relation between living organisms (especially between people)
                                supertype:  #relation  an abstraction belonging to or characteristic of two entities or parts together
                                   supertype:  pm#thing_that_can_be_seen_as_a_relation  usable as relation type
                                      supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                                         supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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