What does XX stand for?

What does XX mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: XX.

We've found a total of 8 definitions for XX:

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XX

Double Cross

Governmental » US Government

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XX

Double Cross

Governmental » Military

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XX

Xx Xx

Miscellaneous » Unclassified

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XX

Female Sex Chromosome

Medical » Physiology

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XX

Xiu Xiu

Miscellaneous » Unclassified

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XX

Roman Numeral 20

Academic & Science » Mathematics

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XX

XXdecode - XXencode Encoded file archive ( ASCII)

Computing » File Extensions

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xx

female chromosome

Medical » Human Genome

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What does XX mean?

twenty, 20, XX(noun)
the cardinal number that is the sum of nineteen and one

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"XX." Abbreviations.com. STANDS4 LLC, 2015. Web. 29 Aug. 2015. <http://www.abbreviations.com/XX>.