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If you want to go for a techi-sounding term with a prefix like the Italian term, then you can say "pre-columnized," although I have not been successful in finding a citation for that. You may very well be the first to put this term in use. (Incidentally, I have been able to find a citation with "de-columnized." If that is a legitimate term, why not "pre-columnized"?)
See citations above
Fuad Yahya Native speaker of: Arabic, English PRO pts in pair: 92