1) Fictional material
Found on
https://www.crosswordclues.com/clue/dilithium
[Star Trek] In the Star Trek universe, dilithium is a fictional chemical element, although dilithium is also a legitimate name for an allotrope of lithium, which is composed of diatomic molecules. ==Description and usage== Dilithium is depicted as an extremely hard crystalline mineral that occurs naturally on some planets. When placed in a ...
Found on
http://en.wikipedia.org/wiki/Dilithium_(Star_Trek)
No exact match found.
