M-theory

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M-theory

[′em ‚thē·ə·rē]
(particle physics)
A highly symmetric but only partially understood theory of particles and their interactions that would be a generalization of supergravity and would be related by weak-strong duality to each of the five known superstring theories.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.