terminology

noun

Etymology: From French terminologie or German Terminologie and their source, New Latin terminologia, from Medieval Latin terminus (“a term”) + -ologia (“study of”), from -o- (“(interconsonantal)”) + -logia, from Ancient Greek -λογία (-logía, “-logy, branch of study, to speak”).

1. A treatise on terms, especially those used in a specialised field.
2. The set of terms actually used in any business, art, science, or the like; nomenclature; technical terms.

   “Ad for advertisement is struggling hard for general recognition; some of its compounds, e. g., ad-writer, want-ad, display-ad, ad-card, ad-rate, column-ad and ad-man, are already accepted in technical terminology.”

   “[The researchers] noticed many of their pieces of [plastic marine] debris sported surface pits around two microns across.[…]Closer examination showed that some of these pits did, indeed, contain bacteria, and that in several cases these bacteria were dividing and thus, by the perverse arithmetic of biological terminology, multiplying.”

3. The scientific study of such terms.