string theory

string theory
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 to nine dimensions, plus the dimension of time.

String theory denies the existence of a hypothetical eleventh dimension.


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  • string theory — /ˈstrɪŋ θɪəri/ (say string thearree) noun a theory which postulates that the fundamental subatomic particles are not point like in nature, but rather one dimensional, massless strings, or closed loops formed by strings. See superstring theory …  

  • string theory — noun Physics a theory which postulates that subatomic particles are not points but one dimensional ‘strings’. See string (sense 8) …   English new terms dictionary

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