#acid  any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
  subtype:  alkapton  arsenic_acid  cerotic_acid  chloric_acid  chlorous_acid  monobasic_acid  dibasic_acid  tribasic_acid  tetrabasic_acid  fulminic_acid  gamma_acid  hydriodic_acid  hydrocyanic_acid  hydroxy_acid  hyponitrous_acid  lysergic_acid  manganic_acid  methacrylic_acid  selenic_acid  sulfonic_acid  titanic_acid  perchloric_acid  carboxylic_acid  aminobenzoic_acid  nitric_acid  nitrous_acid  aqua_regia  barbituric_acid  lansoprazole  boracic_acid  boric_acid  bromic_acid  carbamic_acid  carbolic_acid  carbonic_acid  chromic_acid  citric_acid  cyanamide  cyanic_acid  cyanuric_acid  ferricyanic_acid  ferrocyanic_acid  fluoroboric_acid  fluosilicic_acid  formic_acid  fumaric_acid  gallic_acid  glyceric_acid  glycolic_acid  hydrobromic_acid  hydrochloric_acid  hydrogen_chloride  hydrofluoric_acid  hydroiodic_acid  hypochlorous_acid  iodic_acid  isocyanic_acid  itaconic_acid  maleic_acid  oxalacetic_acid  oxalic_acid  oxyacid  pantothenic_acid  para_aminobenzoic_acid  pectic_acid  permanganic_acid  phthalic_acid  picric_acid  pyruvic_acid  dichromic_acid  silicic_acid  sulfanilic_acid  thiocyanic_acid  toluic_acid  triphosphoric_acid  undecylenic_acid  uric_acid  oil_of_vitriol  xanthic_acid
  supertype:  chemical_compound__compound  (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
     supertype:  substance__matter  that which has mass and occupies space; "an atom is the smallest indivisible unit of matter"
        supertype:  physical_entity_part_or_substance
           supertype:  physical_entity__object  spatial entity made of matter
              supertype:  physical_endurant__PED
                 supertype:  spatial_object__spatialobject  object which as a direct spatial location, e.g., physical object, spatial region or shape
                    supertype:  object__entity_with_spatial_feature  spatial object (space, location or physical object) or description medium/container (e.g., string, language, image); in a 4D ontology, an object is something whose spatiotemporal extent is thought of as dividing into spatial parts roughly parallel to the time-axis
                       supertype:  entity  something that can be "involved" in a situation
                          supertype:  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:  physical__physical_thing  an entity that has a location in space-time; locations are themselves understood to have a location in space-time; click here for more details on the identical category sowa#physical_thing
                          supertype:  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:  partially_tangible__partiallytangible  A subcollection of cyc#SpatialThing-Localized and cyc#TemporalThing. Each instance of cyc#PartiallyTangible has a tangible (i.e. material) part and a temporal extent (i.e. it exists in time). It might or might not also have an intangible part. For example, a particular copy of a book is made of matter, has temporal extent, and also has an intangible part: the information content of the text markings on its pages.
                       supertype:  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:  individual__particular___supertype_of_1st_order_types  all individuals (for concepts or relations) are implicitely or explicitely instance of that type
                       supertype:  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:  endurant__ED
                    supertype:  entity  something that can be "involved" in a situation
                    supertype:  thing  an object seen from a 3D (or endurantist) perspective, i.e. where a spatial entity may have a time independent identity, as opposed for example to the 4D perspective where each spatial entity has an associated time frame; click here and here for details
                       supertype:  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:  endurant_or_perdurant__ED_or_PD
                       supertype:  quality_or_endurant_or_perdurant__Q_or_ED_or_PD
                          supertype:  entity  a category from DOLCE or generalized by a category from DOLCE
                             supertype:  individual__particular___supertype_of_1st_order_types  all individuals (for concepts or relations) are implicitely or explicitely instance of that type
                 supertype:  PQ_or_PED_or_PR_or_PD
                    supertype:  quality_or_endurant_or_perdurant__Q_or_ED_or_PD
              supertype:  tangible  Something which is not intangible, something which is physical, made of matter. It does not matter whether things are real of imaginary. Therefore we consider Mickey Mouse's car and a hippogriff as  tangible things
                 supertype:  temporal_thing  The collection of all things that have temporal extent or location, i.e. things about which one might sensibly ask When? . cyc#TemporalThing thus contains many kinds of things, including events, physical objects, agreements, and abstract pieces of time. Note that cyc#TimePoint is a specialization of cyc#TemporalThing, since time points have temporal location, although they arguably lack temporal extent. Abstract things that are timeless -- such as mathematical sets, attributes, and numbers -- are of course _not_ instances of cyc#TemporalThing.
                    supertype:  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:  entity_part
              supertype:  entity_playing_some_role  e.g., an agent, an owner
                 supertype:  entity  something that can be "involved" in a situation
                 supertype:  thing_that_can_be_seen_as_a_relation  usable as relation type
                    supertype:  thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                       supertype:  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

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