XU
xULN
XUV
xvse
XX
XX male
XX/XY
XXX female
XXY male
XXY syndrome
Xy
XY
xyl-
Xyl
xylazine
xylene
xylene cyanol FF
xylenol
xylidine
xylitol
xylitol dehydrogenase
xylo-
xylobiose
xyloidin
xyloketose
xylol
xylonic acid
xylopyranose
xylose
xylose test
xylostyptic ether
xylulose
xylulose 5-phosphate
xylulose reductase
xylyl
xylyl bromide
xylylene
xysma
XYY male
XYY syndrome