when there is a new invention, there is a new name for original object, what is this called?

Question

IS there a term or lingusitic device for a name change of a noun / object that has had to change its name because of a new development. For example the invention of the electric guitar, meant the humble guitar became known as an acoustic guitar? Thank you.

Answer 1

You are describing a retronym:

A word or phrase created because an existing term that was once used alone needs to be distinguished from a term referring to a new development, as acoustic guitar in contrast to electric guitar or analog watch in contrast to digital watch.

American Heritage® Dictionary of the English Language