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extravascular
extravehicular
extravehicular activity
extraversion
extravert
extreme
Extreme Games
extreme sport
extreme unction
extremely
extremely high frequency
extremely low frequency
extremism
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extraterrestrial

ex·tra·ter·res·tri·al [ èkstrə tə réstree əl ]


adjective 
Definition:
 
outside Earth: existing or coming from somewhere outside Earth and its atmosphere



noun  (plural ex·trater·res·tri·als)
Definition:
 
alien: a living being that comes from outside Earth, especially in science fiction

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