X

X-ALD X-linked Adreno Leuko Dystrophy
XANES X-ray Absorption Near Edge Spectroscopy
XFEL X ray Free Electron Laser
XIAP X-linked Inhibitor of Apoptosis Protein
XL Cross Linking
XOI xanthine oxidase inhibitor
XPS X-ray Photoelectron Spectroscopy
XPS eXtruded Poly Styrene
XR eXtended Release