Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym XXY is...

XXY is

  • Klinefelter Syndrome chromosomes

XXY is also in:

Acronym Definition Searched: ZYM PASA HBP 91302 UCE CA LOGX WMD 24157 SZX FEO PROTECT TT BEST 54625