nulladik
Nulladik is a term that has seen varied usage and interpretation across different contexts. In some historical or literary references, it might denote a specific type of object, a character, or a concept that is not widely recognized in mainstream dictionaries. The precise meaning can be highly dependent on the source material where it appears. Without further context or a specific domain of application, it is difficult to provide a definitive explanation of what "nulladik" refers to.
It's possible that "nulladik" is a neologism, a term coined for a specific purpose within a fictional