Definition of X-rays:
(n) :
(social media) An online social media network, formerly known as Twitter.
(n) :
A placeholder for an unknown, suppressed or hypothetical name.
(n) :
(anthroponymy, politics) A surname, used by those who have had their identity or heritage, including their proper ancestral names, erased or forgotten.
(n) :
Any mark that looks like that letter, such as a mark made by a person who cannot read or write in lieu of a signature.
(adj) :
Intersex or non-binary (in passports and identification documents).
(n) :
(slang) Ecstasy, a particular street drug.