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.

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Etymology

Origin of identical twin

First recorded in 1885–90

Example Sentences

See Examples For:

identical twin

I started raising monarch butterflies because my identical twin sister, who played my twin on the show, planted a butterfly garden.

From Los Angeles Times ● Jul. 10, 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

Yates and his identical twin brother Adam turned professional in 2014 with Orica-GreenEdge, now known as Jayco-AlUla.

From BBC ● Jan. 7, 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

I’d like to know how she’s done it, this trick with my brother that’s turned him into a stupider, more nervous identical twin of himself.

From "Cat's Eye" by Margaret Atwood

Related Words

• Siamese twin
• fraternal twin