[mainland]

Actually, a tax is termed "progressive" when the tax rate increases as the taxable amount increases. A "regressive" tax is a tax where the tax rate decreases as the taxable amount increases.

It's true that "progressives" often advocate "progressive" taxes, but the term has a technical meaning when applied to taxes. Feel free to look it up yourself.

[cryptnoob]

My contention still stands as to roots and derivations of both terms.

However, I see too many, non-biased sites defining "regressive tax" as you do, to see the point in arguing. This battle was lost 50 years ago. The definition has apparently become an accepted one. I find that very disturbing.

For the record, I personally find the term to be a loaded one, and I disagree with it.