The Wordnik Word of the Day for September 21, 2012 is
chrononaut
http://www.wordnik.com/words/chrononaut(noun) A time-traveller.
'Chrononaut' comes from the Greek 'khronos,' time, plus 'naus,' ship.
Example:
It seems that two government employees and self-professed time-travelers — er, ‘chrononauts’ — Andrew D. Basiago and William Stillings have come forth and named President Obama as one of their own, along with the current head of Read More...
Published on September 21, 2012 12:18