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

James Warren Whittaker was born on Feb. 10, 1929, in Seattle, 10 minutes before his identical twin brother, Louis.

From The Wall Street Journal ● Apr. 15, 2026

"I always wished I was an identical twin - I liked being a twin, but being an identical twin is a bit cooler," Grace said.

From BBC ● Feb. 24, 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

Related Words

• Siamese twin
• fraternal twin