There are multiple definitions:

1. xanthan gum(English)

   • buccal drug delivery is an alternative approach for oral and parenteral route
   • Therapeutic approaches
   • https://doi.org…17055-7.00005-4

2. eXtreme Gradient(English)

   • refers to machine learning algorithm of gradient boosted trees
   • AROMA, FD, INU, PCoA, XG, ANT
   • Medical imaging, Machine learning
   • https://doi.org…sci.2023.108478