hernesheir encourages me to make some kind of comment here, asserting precedence of coinage, but as noted below, there are other coinages of which I am more proud. Still, I know that there is a diligent cohort of Wordnikians for whom panvocalics hold a certain fatal fascination - God bless 'em.
Containing all the vowels (adj.), a word that contains all the vowels (noun). First coined by Peter T. Daniels on 20 Feb 2005 on sci.tech-archive.net. Coined independently by Sionnach in a comment on murcielago on 24 October 2007, which I discovered through a Google search when I became the third person to independently coin panvocalic, on 28 October 2007. That search is also how I discovered Wordie.