Archaic technological nomenclature are forms of speech and writing which, while once commonly used to describe a particular process, method, device, or phenomenon, have fallen into disuse due to the advance of science and technology. Such archaism is inevitable where continual re-invention and discovery makes technical concepts, names and descriptions redundant.
As technology evolves, new names are required to describe the products, services, processes, methods, and devices invented. Often, the first names and phrases brought into use by are by the inventor(s), by journalists covering the development, and marketers trying to sell the services and products. Other terms were developed by the public to explain the technology that they used. Some of these terms were initially widely used, then fell out of the common vernacular. Others failed to "catch on" and never entered common usage in the first place. Sometimes, the technologies themselves were superseded, and the term fell into disuse.
In the history of science, forms of words are often coined to describe newly observed phenomena. Sometimes the words chosen reflect assumptions about the phenomenon which later turn out to be erroneous. In most cases, the original forms of words then become archaic and fall into disuse, with notable exceptions.
This list documents such archaisms.