Where does this definition of seismic vertical come from?
This entry for seismic vertical is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Is seismic vertical a noun, verb, or something else?
In this entry, seismic vertical 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.