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In fairness, versine is "archaic" in the "my parents used this when they were in school, but I didn't need to" sense. It only went out of use when people stopped using trig tables, replacing them with digital calculators.

And of course the actual calculation of this function had to be done (up to a factor of 2) all the time during navigation until things like GPS appeared. See https://en.wikipedia.org/wiki/Haversine_formula

Also reminds me of terms from music such as "hemidemisemiquaver".

Correct me if I am wrong but I don't think this one is that archaic.

I remember this one from high school (1999/2000). Is "verseno" (Spanish).

It's not really archaic as a name, it's just a very rarely used concept.

When would you need to refer to versions by name?

Technically they still hold true, but most people don't use them or even know about them these days.

wow, thanks! that is an incredibly interesting article, and way to learn trig, I think I would have gained more insights had that been part of my introduction.

I'm sort of wondering if that terminolgy sounded more natural then because in "older" English, closer to Germanic roots, it was natural to create new words by pasting together morphemes.