Etymology
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alien (n.)
"foreigner, citizen of a foreign land," early 14c., from alien (adj.) or from noun use of the adjective in French and Latin. In the science fiction sense "being from another planet," from 1953.
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alienage (n.)
"state of being alien," 1753, from alien (adj.) + -age. Other abstract noun forms include alienship (1846); alienness (1881).
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alien (adj.)

c. 1300, "strange, foreign," from Old French alien "strange, foreign;" as a noun, "an alien, stranger, foreigner," from Latin alienus "of or belonging to another, not one's own, foreign, strange," also, as a noun, "a stranger, foreigner," adjective from alius (adv.) "another, other, different," from PIE root *al- (1) "beyond."

Meaning "residing in a country not of one's birth" is from mid-15c. Sense of "wholly different in nature" is from 1670s. Meaning "not of this Earth" first recorded 1920. An alien priory (mid 15c.) is one owing obedience to a religious jurisdiction in a foreign country.

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alienable (adj.)

"that can be surrendered or given up," 1610s; from obsolete alien (v.), for which see alienate, + -able. Related: Alienability.

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acculturation (n.)
"the adoption and assimilation of an alien culture" [OED], 1880, from assimilated form of ad- "to" + culture (n.) + noun ending -ation.
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alienate (v.)

1510s, "transfer to the ownership of another;" 1540s, "make estranged" (in feelings or affections), from Latin alienatus, past participle of alienare "to make another's, part with; estrange, set at variance," from alienus "of or belonging to another person or place," from alius "another, other, different," from PIE root *al- (1) "beyond." Related: Alienated; alienating.

In Middle English the verb was simply alien, from Old French aliener and directly from Latin alienare. It is attested from mid-14c. in theology, "estrange" (from God, etc.; in past participle aliened); late 14c. as "break away (from), desert;" c. 1400 in law, "transfer or surrender one's title to property or rights."

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naturalization (n.)

"act of naturalizing; state of being naturalized;" specifically in reference to the act of receiving an alien into the condition of a natural citizen, 1570s, from French naturalisation, noun of action from naturaliser (see naturalize).

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borg (n.)
fictional hostile alien hive-race in the "Star Trek" series, noted for "assimilating" defeated rivals, first introduced in "The Next Generation" TV series (debut fall 1987). Their catchphrase is "resistance is futile." According to the series creators, the name is derived from cyborg.
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pyroxene (n.)

type of mineral, 1800; from Greek pyr "fire" (see pyro-) + xenos "stranger" (see xeno-). According to OED, so named in 1796 by Abbé Haüy, French mineralogist, "because he thought it 'a stranger in the domain of fire' or alien to igneous rocks." Related: Pyroxenic.

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metic (n.)

"resident alien in an ancient Greek state," 1808, from Late Latin metycus, from Greek metoikos, literally "one who has changed his residence," from meta "change" (see meta-) + oikos "dwelling," from oikein "to dwell" (from PIE root *weik- (1) "clan"). Generally they bore the burdens of a citizen and had some of a citizen's privileges.

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