Twinning (making a

twin Twins are two offspring produced by the same pregnancy Pregnancy is the time during which one or more offspring develops ( gestates) inside a woman's uterus (womb). A multiple pregnancy involves more than one offspring, such as with t ...

of) may refer to: * In biology and agriculture, producing two offspring (i.e.,

s) at a time, or having a tendency to do so; *

Twin towns and sister cities A sister city or a twin town relationship is a form of legal or social agreement between two geographically and politically distinct localities for the purpose of promoting cultural and commercial ties. While there are early examples of inter ...

, towns and cities involved in town twinning * Twinning institutional building tool *

eTwinning The eTwinning action is an initiative of the European Commission that aims to encourage European schools to collaborate using Information and Communication Technologies (ICT) by providing the necessary infrastructure (online tools, services, sup ...

, an EU collaboration project in which two schools in different locations are paired and communicate using the internet * Afri Twin, an exchange partnership between schools in the United Kingdom and South Africa *

Twinning (roads) Twinning a road involves the construction of a similar or identical parallel road. It is usually done when an existing highway requires a significant increase in capacity. Twinning is frequently advantageous because it allows traffic capacity to be ...

, construction of one road next to another * In crystallography,

crystal twinning Crystal twinning occurs when two or more adjacent crystals of the same mineral are oriented so that they share some of the same crystal lattice points in a symmetrical manner. The result is an intergrowth of two separate crystals that are tightly ...

refers to intergrown crystal forms that display a twin boundary * In film,

special effect Special effects (often abbreviated as SFX, F/X or simply FX) are illusions or visual tricks used in the theatre, film, television, video game, amusement park and simulator industries to simulate the imagined events in a story or virtual w ...

s that multiply the presence of the same actor or actress on screen * In animation, twinning refers to when two parts on opposite sides of a character's body move the same way * A type of

transnational education International education refers to a dynamic concept that involves a journey or movement of people, minds, or ideas across political and cultural frontiers. It is facilitated by the globalization phenomenon, which increasingly erases the constra ...

in which a student does part of their degree course in a local private college and part of it in an overseas institution tied to the college * ''Twinning'' (TV series), a 2015 reality show on VH1

See also