Ipsilon From Wikipedia the free encyclopedia Look up ipsilon in Wiktionary, the free dictionary. Ipsilon may refer to: Ipsilon Networks, a defunct company The Greek letter upsilon The Latin letter Y The Fedora Project's Ipsilon IdP See also[edit] Upsilon (disambiguation) Ypsilon (disambiguation) Topics referred to by the same term This disambiguation page lists articles associated with the title Ipsilon.If an internal link led you here, you may wish to change the link to point directly to the intended article.