vevegység
Vevegység is a term that does not have a widely recognized meaning in Hungarian. It is not listed in major dictionaries and is typically considered a misspelling or nonce form. In most cases the form appears in texts due to typographical error, or as an attempt to coin a new term without established usage.
When it appears, the intended sense is ambiguous. In many contexts it could be a mistaken variant
Etymology: If one treats vevegység as a word, it would likely be built from the chemical root
Practical note: In authoritative Hungarian texts, writers should use established terms such as vegyesség, vegyület, vegytan,