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In biology, Twins are two or more siblings which gestated and were born together. Types of biological twins include:

• Fraternal twins
• Identical twins
• Multiple births, while not necessarily twins, are sometimes referred to as "multiple twins".
• Conjoined twins, or Siamese
• Parasitic twin, a very rare condition caused by a variety of circumstances
• Twin can also refer to a doppelgänger or clone.

Contents 1 Pair of associated similar objects or concepts 2 Places 3 Music 4 Other uses

[edit] Pair of associated similar objects or concepts

• Town twinning, two distant cities that agree to partner each other, for various reasons
• Twin boundary, where two crystallites which share atoms at repeated intervals and have only a minor difference in orientation meet at
• Twin cities, two towns or cities that are geographically close to each other, and often referred to collectively. The term is most often used to describe the Minneapolis-St. Paul metropolitan area in Minnesota, United States. Other examples include the Twin Ports of Duluth, Minnesota and Superior, Wisconsin, United States
• Twin prime, a prime number that differs from another prime number by two
• Twin Towers, any of a number of matching structures, most notably the former World Trade Center in New York City

[edit] Places

• Canada
  • Twin Islands (British Columbia)
  • North Twin Island (Nunavut)
  • South Twin Island (Nunavut)
• USA
  • Twin Island, New York
  • Lower Twin Island, West Virginia
  • Upper Twin Island, West Virginia
  • Twin Mountain, New Hampshire, a village
  • The Twin Range of New Hampshire

[edit] Music

• The Twins (Gayle & Gillian Blakeney), who scored a one hit wonder under that name with "All Mixed Up" in 1991
• The Twins (Sven Dohrow & Ronny Schreinzer), a German musical group
• Twins (group), a Hong Kong-based Cantopop musical group
  • Twins (2002 EP), the name of group Twins self-titled album
• Twins (Ornette Coleman album), an album by Ornette Coleman
• Twin (production team), a music production team
• "TWINS (Knock Out)", a song by Super Junior from their 2005 album, Super Junior 05

[edit] Other uses

• First Twin and Second Twin, the twin lost boys in J.M. Barrie's Peter Pan
• Minnesota Twins, baseball team of Major League Baseball, which take their name from the Twin Cities of Minneapolis and St. Paul
• The Twins (novel), a 2000 novel by Tessa De-Loo
  • Twin Sisters (film), film adapted from the novel The Twins
• Twin (computing), a Text WINdows computer interface
• Twin (mythology), a very common theme in mythology
• Twin, a standard bed, mattress, or sheet size
• Twin paradox, a thought experiment in special relativity
• Twins (film) (disambiguation) one of several films of this name
• The Twins (film), a 2005 South Korean film
• Twins (The Matrix), characters from The Matrix Reloaded
• Twins (TV series), a sitcom that debuted on The WB Television Network in September 2005
• Twins, a photobook by Steven Underhill
• Twins --- A Variety Store Named 'The End of the World', a novel by Japanese author Novala Takemoto
• Gemini (astrology), Latin for twins, a zodiac sign
• The Twins, two robots in the Transformers universe.

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