RETRONYM

Domain	Definition
Computing	Retronym A term invented to distinguish a subclass of things from new members of the superclass, where the distinction was previously not necessary, since the old subclass had been all there was of the superclass. For example, the retronyms "snail mail" and "paper mail" were coined by those for who "mail" was likely to mean electronic mail. While the English language in general has a few retronyms ("whole milk", "snow skiing", "acoustic guitar"), hacker jargon is necessarily (at points capriciously) rich in retronyms, e.g. plaintext, natural language, impact printer, eyeball search, biological virus. [More examples?] (2001-02-25). Source: The Free On-line Dictionary of Computing.
Source: compiled by the editor from various references; see credits.

Specialty Definition: Retronym

A retronym is a new word or phrase coined for an old object or concept whose original name became used for something else. "Retronym" is a neologism coined by Frank Mankiewicz[1] and popularized by William Safire[1] in 1980 in the New York Times. A lot of these are created by advances in technology. Some examples:

Black-and-white television: Once called simply television, now the retronym is used to distinguish it from color television, which is now more commonly referred to by the unadorned term. Along the same lines: broadcast television, silent movie.
Rotary-dial telephone: The kind of telephone in common use before touch-tone telephones.
Live poker: What casinos call the kind of poker played with cardss by people sitting at a table; what many others still just call "poker". The term became necessary to distinguish it from video poker, which is far more common in casinos today.
Day baseball: Baseball played during the day, as all games were played before electric lighting in stadiums became common.
Snail mail or paper mail: Non-electronic mail; the kind printed and delivered to your house.
Meatspace: All of physical reality, as distinguished from cyberspace.
Natural language: A language, used by humans, that evolved naturally in its society. Contrast with computer programming languages or constructed languages.
Brick-and-mortar store: A store with a building that customers can visit to examine its goods (which others might purchase at an online store).
Face-to-face conference: A conference, not involving telephones or video cameras (similarly:IRL-meeting = in-real-life meeting).
French franc: The currency unit of France before the euro, which was originally the only franc, but had to be distinguished from the Belgian franc, Communauté Financière Africaine franc, and Swiss franc after those countries adopted it.
Hot chocolate: In the days before the invention of sweet solid chocolate for eating, the word "chocolate" was usually used to refer to the drink; references to it in, say, Jane Austen's novels are confusing to the 21st century eye. For a while after the chocolate bar was invented it was referred to as "bar chocolate", but due to its stunning rise in popularity in the latter half of the 19th century it eventually laid claim to the basic word.
Pocket watch: Before the advent of the wristwatch, the word watch referred to watches carried in the pocket. After the advent of the wristwatch, the word watch referred to a watch worn on the wrist.
Analog watch: Before the advent of the digital watch, all watches had faces and hands. After the advent of the digital watch, watches with faces and hands became known as analog watches.
Sit-down restaurant: With the rise of fast-food and take-out restaurants, the "standard" restaurant received a new name.

Some larger groupings include:

Conventional or Traditional X: For example, conventional (non-microwave) oven.
Analog X: Non-digital devices: analog clock, analog recording, Analogue disc record.
Acoustic X: A musical instrument that produces human-audible sounds, without amplifier: acoustic guitar, acoustic piano.

Compare to backronym

Anagrams: RETRONYM

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "e-m-n-o-r-r-t-y"
	-2 letters: etymon, mentor, ornery, retorn, termor, tremor.
	-3 letters: enorm, entry, merry, metro, money, monte, motey, noter, onery, ormer, retro, retry, tenor, terry, toner, toney, toyer, trone.
	-4 letters: meno, mony, more, morn, mort, mote, nome, norm, note, omen, omer, oyer, rent, rote, ryot, term, tern, tome, tone, tony, tore, torn, torr, tory, trey, troy, tyer.
	Words containing the letters "e-m-n-o-r-r-t-y"
	+3 letters: chronometry, craniometry, premonitory.
	+4 letters: contemporary, erythromycin, remuneratory, trigonometry.
	+5 letters: anthropometry, erythromycins, exterminatory, grandmotherly, hyperromantic, premonitorily, recriminatory, remonstrantly.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.