Suppose I invent a phrase to describe a particular thing, such as "the three-particle paradigm", which is a new paradigm that I have developed to think about a certain field within particle physics.
I'm looking for alternatives to the words phrase or term to describe "the three-particle paradigm". Is it correct to refer to this one phrase as a nomenclature? Or is nomenclature more for a collection of words encompassing a bigger body of knowledge?
If nomenclature is invalid, please provide alternatives.
The reason I'm looking for a word like this is that I want to explain why I chose these words, such as:
Allow me to explain the nomenclature "the three-particle paradigm": First, there are three particles. Second, ...
Using phrase doesn't sound too good to me.