language, word; term
When you come across an unfamiliar word, you have to look it up in a dictionary.
発明や科学技術のために古い語が新しい意味をとるようになる場合が多い。
Old words often acquire new meanings to describe inventions and scientific technologies.
A word’s original meaning is not necessarily its current primary meaning.
As far as I know, there is no such word.