This question on the history of the ellipse terminology was migrated to hsm after a week of being active on MO and receiving several useful answers.
Did the OP ask for migration?
Why are some history related question on MO migrated to hsm and others not?
My personal opinion on hsm, where I was active for some time: afaik, the site never attracted an active community of researchers of the history of science and mathematics. The handful of (very competent) mathematicians that answer questions there are almost all active on MO, but some left (or never joined) hsm since the site didn't live up to it expectations. After 5 years of existence, the site never left beta and it doesn't look like it ever will. So, personally I'd rather have questions on the history of mathematics here on MO than on HSM. What do others think?
Update (June 1, '20) the question has been sent back to MO: The origin(s) of the word "elliptic"