Generic Term for Derivative of a Conceptual System

What is the generic term for a noun that forms part of the main vocabulary of a conceptual system?

For example:

  • A number is a derivative of arithmetic.

  • A word is a derivative of language.

  • An atom is a derivative of chemistry.
  • A border is a derivative of map.

I’m looking for the most appropriate replacement for the word ‘derivative’ above. Preferably a single word!


Perhaps constituent (as a noun)

a component part; ingredient


Similarly, Merriam-Webster

an essential part : component, element

Source : Link , Question Author : Conor , Answer Author : bib

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