Wiktionary
a. 1 Of or pertaining to heterosis 2 (context physics English) Describing a hybrid form of string theory (See http://en.wikipedia.org/wiki/Heterotic%20string on Wikipedia)
Usage examples of "heterotic".
Again, both heterotic theories incorporate a version of supersymmetry.
Whatever the reasons, a large number of people soon began to work on string theory and a new version was developed, the so-called heterotic string, which seemed as if it might be able to explain the types of particles that we observe.
Here, for example, is the physicist Michio Kaku explaining the structure of the universe from a superstring perspective: “The heterotic string consists of a closed string that has two types of vibrations, clockwise and counterclockwise, which are treated differently.