I came across the word "horicontal" in a technical paper. The context made it clear that its meaning was effectively identical to "horizontal". I looked into it, suspecting a misspelling. I found enough instances of the word in published works that I now think it is more than a mere typo.
It seems to me that I saw "horicontal" used with disproportionately high frequency in technical publications, and in publications with at least one (usually more) German authors.
I'd like to know the etymology of "horicontal"—how did this spelling originate? Does it appear as a translation in foreign dictionaries? I could not find any examples of such.
Here are some examples of "horicontal" in published work:
And a slide originally from the 1918 "Gray's Anatomy of the Human Body", whose Wikipedia Commons file description by two Germans uses the word "horicontal" while the file name uses "horiconatal" which is almost certainly a typo (natal or conatal make no sense in context):