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Noun: haecceity  hek'see-i-tee
  1. The essence that makes something the kind of thing it is and makes it different from any other
    - quiddity

Derived forms: haecceities

Type of: center [US], centre [Brit, Cdn], core, essence, gist, heart, heart and soul, inwardness, kernel, marrow, meat, nitty-gritty, nub, pith, substance, sum

Encyclopedia: Haecceity