Medical abbreviations : ' X '

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 

Abbreviation	Interpretation
X2d	times 2 days.
XI	eleven
XII	twelve
XL	extended release. |  extra large.
XM	crossmatch
XMM	xeromammography
XOM	extraocular movements
XRT	X-ray therapy (radiation therapy)
XS	excessive
XULN	times upper limit of normal