When the term "electric guitar" became nearly as popular as the original unmodified word "guitar", the term "acoustic guitar" emerged because "guitar" (unmodified) was considered ambiguous. "Acoustic guitar" is labeled the retronym. What is "electric guitar" labeled?

Certainly, both "electric guitar" and "acoustic guitar" are neologisms. But I think it would be useful to have a word to denote the neologism ("electric guitar") that caused the retronym neologism to come into being. I looked around and didn’t find any such word. Before I coined one myself, I wanted to make sure that there wasn’t one already out there. So I am asking here.

BTW, if there is nothing else out there, I’m thinking of coining the word "specinym" for "specialized term." Retronyms come into being when someone puts a specialized qualifier in front of a word denoting a concept that previously did not have any "species" and then the specialized term becomes popular.

Here’s how I would use "specinym" in a sentence: "The popularization of a specinym like ‘electric guitar’ is what leads to the creation of a retronym like ‘acoustic guitar’." Got any better proposals? How about "neonym"?