polytypism

About 0.01 uses per million words.

Meaning

1. noun The existence of multiple types, especially of multiple subspecies.
2. noun The existence of multiple forms differing in only one of the dimensions of the unit cell.

Similar words

polymorphy polymorphia polymorphicity polymorphism polymorph polyphenism allotypy pleomorphism morphism pleiomorphism

Often followed by

in of are is and