Where does this definition of registration mark come from?
This entry for registration mark is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Is registration mark a noun, verb, or something else?
In this entry, registration mark is tagged as 2n..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.