terminology

noun3

1. •
   The set of terms actually used in any business, art, science, or the like; nomenclature; technical terms.

   • Language is always changing — but it shouldn’t become inflexible, especially when new terminologies, in the name of inclusion, sometimes wind up making others feel excluded. — 2022
2. •
   The scientific study of such terms.
3. •
   A treatise on terms, especially those used in a specialised field.