'''Enneagonum'''<ref>[http://en.wiktionary.org/wiki/enneagon en:wiktionary]</ref> vel '''Nonagonum'''<ref>[http://books.google.de/books?id=tiHUN6jjm6MC&pg=PA159&lpg=PA159&dq=nonagonum&source=bl&ots=HkkoW-H94v&sig=mzyZU5RJfBStoKEtKyMGKV6Jdbo&hl=en&sa=X&ei=4YN3T5-nPMf1sgbyh8mkBA&redir_esc=y#v=onepage&q=nonagonum&f=false Campanus of Novara and Euclid's elements, Volume 1 By Euclid, Hubertus Lambertus Ludovicus Busard]</ref> est [[polygonum]] novem angulorum et laterum.
