Hopefully that will help you grasp the relationship between camera lenses and film and that between optical and digital imaging as well.
I'm aware of the relationship. Camera lenses produce an optical trick known as anamorphosis. Digital image processing for DVDs *simulate* anamorphosis, but it isn't anamorphosis. But we call them "anamorphic" anyway because of the similarities. And by a completely reasonable extension, games with fixed aspect ratios and dynamic letterboxing *simulate* the effect of watching an anamorphic DVD on a widescreen TV.
Also on that page, you'll find another link to the entry for Anamorphic format which describes the etymology of the term:
I'm not disagreeing with you on the etymology of the term
as it applies to optics. What I'm saying is that "upwards shaping" also make sense etymologically, and that's what we use.
Adding black bars on top of and below content is not forming it again,
It's not forming the *content* again, but it is forming the *shape* again. Nowhere in the structure of the word "anamorphic" does it specify that the shape cannot include the black bars as well.
it is not the "intentional distortion" described in the definition of anamorphic.
That's why it's a neologism.
Really, anamorphic works fine. The new definition is completely logical (it doesn't matter that the new definition is different from the old one - that's why it's a new one), it's defined clearly on this website, and it refers to a behavior that is familiar to people who purchase videos that are advertised as "anamorphic."