Xenos (pronounced ZEE-nos) is a High Gothic term used by the Imperium of Man that means "stranger" and "alien". It is often used by the Adeptus Terra to signify enemy alien or off-world non-Imperial forces. The main xenos races in the Milky Way Galaxy are the Tau, Necrons, Eldar, Dark Eldar, Orks and Tyranids, though there are literally countless other intelligent alien species, many of them hostile, that Mankind has encountered over the long millennia of its expansion across the stars.

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