Retronym

retroactively namedrenamedretroactive additionretroactivelyretroactively renamedretronymiclabelednot applied untilnow known asredesignation
A retronym is a newer name for an existing thing that differentiates the original form or version from a more recent one.wikipedia
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Acoustic guitar

acousticacoustic guitarsguitar
For example, the term "acoustic guitar" was coined at the advent of electric guitars and analog watches were thus renamed to distinguish them from digital watches once the latter were invented.
Originally just called a guitar, the retronym 'acoustic guitar' came in use to distinguish it from an electric guitar, that relies on an electronic amplification system.

Safety bicycle

upright bicycleuprightdouble-triangle diamond frame bicycle
The first bicycles with two wheels of equal size were called "safety bicycles" because they were easier to handle than the then-dominant style that had one large wheel and one small wheel, which then became known as an "ordinary" bicycle.
The retronym "upright bicycle" is used to distinguish the style from recumbent bicycles.

Analog watch

Analoganalog displaysanalogue watch
For example, the term "acoustic guitar" was coined at the advent of electric guitars and analog watches were thus renamed to distinguish them from digital watches once the latter were invented.
The name is an example of a retronym; it was coined to distinguish analog watches, which had simply been called "watches", from newer digital watches.

Neologism

neologismscoinedneologistic
A retronym is a newer name for an existing thing that differentiates the original form or version from a more recent one. The term retronym, a neologism composed of the combining forms retro- (from Latin retro, "before") + -nym (from Greek ónoma, “name”), was coined by Frank Mankiewicz in 1980 and popularized by William Safire in The New York Times Magazine.

-onym

glottonymglossonym-nym
The term retronym, a neologism composed of the combining forms retro- (from Latin retro, "before") + -nym (from Greek ónoma, “name”), was coined by Frank Mankiewicz in 1980 and popularized by William Safire in The New York Times Magazine.

Electric guitar

guitarelectricguitars
For example, the term "acoustic guitar" was coined at the advent of electric guitars and analog watches were thus renamed to distinguish them from digital watches once the latter were invented.

Watch

wristwatchwatcheswristwatches
For example, the term "acoustic guitar" was coined at the advent of electric guitars and analog watches were thus renamed to distinguish them from digital watches once the latter were invented.

Penny-farthing

penny farthinghigh-wheelerordinary bicycle
Since the end of the 19th century, most bicycles have been expected to have two equal sized wheels, and the other type has been renamed "penny-farthing" or "high-wheeler" bicycle.

Atari 2600

Atari VCSAtariAtari Video Computer System
The Atari Video Computer System platform was rebranded the "Atari 2600" (after its product code, CX-2600) in 1982 following the launch of its successor, the Atari 5200, and all hardware and software related to the platform were released under this new branding from that point on.

Atari 5200

5200
The Atari Video Computer System platform was rebranded the "Atari 2600" (after its product code, CX-2600) in 1982 following the launch of its successor, the Atari 5200, and all hardware and software related to the platform were released under this new branding from that point on.

Game Boy

Nintendo Game BoyGame Boy PocketGame Boy Light
The original Game Boy was referred to as "Game Boy Classic" after the release of Game Boy Color.

Game Boy Color

GBCColorGame Boy Horror
The original Game Boy was referred to as "Game Boy Classic" after the release of Game Boy Color.

Xbox One

Xbox One XXbox One SXBO
Another game console example is the original Xbox being referred to as the "Xbox 1" prior to the release of the Xbox One.

Classical compound

combining formscombining formneoclassical compound
The term retronym, a neologism composed of the combining forms retro- (from Latin retro, "before") + -nym (from Greek ónoma, “name”), was coined by Frank Mankiewicz in 1980 and popularized by William Safire in The New York Times Magazine.

Name

namesaliasappellation
The term retronym, a neologism composed of the combining forms retro- (from Latin retro, "before") + -nym (from Greek ónoma, “name”), was coined by Frank Mankiewicz in 1980 and popularized by William Safire in The New York Times Magazine.

Frank Mankiewicz

The term retronym, a neologism composed of the combining forms retro- (from Latin retro, "before") + -nym (from Greek ónoma, “name”), was coined by Frank Mankiewicz in 1980 and popularized by William Safire in The New York Times Magazine.

William Safire

Safire, WilliamBill Safire
The term retronym, a neologism composed of the combining forms retro- (from Latin retro, "before") + -nym (from Greek ónoma, “name”), was coined by Frank Mankiewicz in 1980 and popularized by William Safire in The New York Times Magazine.

The New York Times Magazine

New York Times MagazineNew York Times Sunday MagazineThe New York Times Sunday Magazine
The term retronym, a neologism composed of the combining forms retro- (from Latin retro, "before") + -nym (from Greek ónoma, “name”), was coined by Frank Mankiewicz in 1980 and popularized by William Safire in The New York Times Magazine.

The American Heritage Dictionary of the English Language

American Heritage DictionaryAmerican HeritageAmerican Heritage Dictionary of the English Language
In 2000 The American Heritage Dictionary (4th edition) became the first major dictionary to include the word retronym.

List of retronyms

This is a list of retronyms used in the English language.