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-onis or -inis

I think genitive for altitudo is altitudinis, not altitudonis, alike for longitudo and other Latin nouns ending with -udo. It is also inferred because in Italian we say "altitudine", not "altitudone", although other Latin nouns of third declension use -onis for genitive, like "Cato, Catonis", Catone in Italian, "ratio, rationis", razione in Italian, but not those ending with -udo. Renebeto. 26.04.09.

You are correct. That was an error, but it has now been corrected. --EncycloPetey 19:34, 26 April 2009 (UTC)