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