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Wikipedia Word definitions in Wikipedia
In physics , string theory is a theoretical framework in which the point-like particles of particle physics are replaced by one-dimensional objects called strings . It describes how these strings propagate through space and interact with each other. On ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
string theory \string" the`o*ry\ (str[i^]ng" th[=e]`[-o]*r[y^]), n. (Physics) A mathematical theory for describing the properties of fundamental particles, which represents the particles as one-dimensional string-like objects, which exist in the normal ...

Wiktionary Word definitions in Wiktionary
n. (context physics English) A candidate unified theory of all physical forces and particles; a theory which suggests that subatomic particles are one-dimensional strings rather than zero-dimensional points. It also suggests that space-time can have up ...