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Synonyms

identical twin

American  

noun

  1. one of a pair of twins who develop from a single fertilized ovum and therefore have the same genotype, are of the same sex, and usually resemble each other closely.


Etymology

Origin of identical twin

First recorded in 1885–90

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

People who disagree with him include his identical twin brother.

From The Wall Street Journal • Mar. 31, 2026

Brendon has an identical twin brother named Kelly Donovan, who appeared as his stand-in and double in episodes of “Buffy.”

From Los Angeles Times • Mar. 21, 2026

Elliott meets, and is attracted to, Joey’s identical twin brother, the gay Jack, a successful businessman who explains that Joey has suffered serious psychological problems.

From The Wall Street Journal • Feb. 13, 2026

It might be granted that a reactionary is not a conservative’s identical twin — but he is a sibling living under the same roof.

From Salon • Nov. 1, 2025

And then, to impress her, I rotated my arm so she could see the identical twin on the other side.

From "Anthem of a Reluctant Prophet" by Joanne Proulx

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