This is just a trivial question about terminology.
In my native Spain in the early 70's, the music we love was generically referred to as "rock sinfonico" (I guess no need to translate), regardless if we were talking about Genesis, Pink Floyd, King Crimson, Jethro Tull, Gentle Giant, Mike Oldfield, Renaissance, VDGG or much of the jazz-rock-based prog which was made at that time (think Weather Report for an international reference).
As far as I can tell it was only quite a few years later (don't ask me precisely, I guess in the beginning of the 2nd half of the 70's) that the term "rock progresivo" started to be used since the music had branched so much that "rock sinfonico" had clearly become a too limited term and not fitting much of the music that had developed.
I just would like to confirm if it was the same in english-speaking countries (or any other language-speaking countries for what matters).
What terminology came first, "symphonic rock" or "progressive rock"?