Siamese twin

Twin buglers played “Taps” and three police helicopters flew overhead in the missing-man formation.
Funeral Protest Is Too Much for NYPD Union Boss|Michael Daly|January 5, 2015|DAILY BEAST
Target was established in 1962 by the Dayton brothers as a discount offshoot of their eponymous Twin Cities department store.
Best Buy Punches Back at Amazon|William O’Connor|December 27, 2014|DAILY BEAST
Twin girls, Greta and Grace, run around the floor in circles, wearing pink playsuits with tiny pink wings attached.
A Sunni-Shia Love Story Imperiled by al Qaeda|Ruth Michaelson|December 26, 2014|DAILY BEAST
The twin entrepreneurs and stars of HGTV's Property Brothers will be taking your questions live on Tuesday, December 16 at 2pm.
Live Q&A: Drew and Jonathan Scott|The Daily Beast|December 16, 2014|DAILY BEAST

Production companies he was working with discovered that he had a twin brother in the renovation industry.
How the Property Brothers Became Your Mom’s Favorite TV Stars|Kevin Fallon|November 25, 2014|DAILY BEAST
This hurly-burly,” said he, drawing her into a quiet eddy of the stream, “is no place for the communion of two twin souls.
The Joyous Adventures of Aristide Pujol|William J. Locke
The twin whirlpools threatened the affrightened mariner on either side.
The Unsolved Riddle of Social Justice|Stephen Leacock
Through the rear window, Delancy saw twin swords of light from the lamps of another car not so far behind them.
Hooded Detective, Volume III No. 2, January, 1942|Various
Matt listened to the steady hum of the Comet's twin cylinders with an exultation he could not conceal.
Motor Matt's "Century" Run|Stanley R. Matthews
My cousin Philip will believe now that he might be my brothermy twin brotherbut that he appears older than he is.
Tessa Wadsworth's Discipline|Jennie M. Drinkwater

Medical definitions for Siamese twin

Siamese twin

[ sī′ə-mēz′ ]

Either of a pair of conjoined twins. No longer in technical use.