(journalism) Initialism of Xinhua News Agency (“新华社”).; the New China News Agency (新华通讯社); the government news agency of the People's Republic of China

(biochemistry) nucleic acid analogue (nucleic acid analog) ; Initialism of xeno nucleic acid. (backformation) ; X nucleic acid, where "X" is a stand-in for multitude of various nucleic acid acronyms, which are not DNA or RNA

Initialism of X-No-Archive.

plural of XNA

(Internet slang) Indicates the poster’s request for a message not to be stored in Usenet archives.

(electrical engineering, rare) XOR, a logic gate