17-letter words containing x, u, n
- triangular matrix — a square matrix in which either all the entries above the principal diagonal, or all the entries below the principal diagonal, are zero.
- tungsten trioxide — a heavy, canary-yellow, water-insoluble powder, WO 3 , used in the manufacture of tungstates.
- unix brain damage — Something that has to be done to break a network program (typically a mailer) on a non-Unix system so that it will interoperate with Unix systems. The hack may qualify as "Unix brain damage" if the program conforms to published standards and the Unix program in question does not. Unix brain damage happens because it is much easier for other (minority) systems to change their ways to match non-conforming behaviour than it is to change all the hundreds of thousands of Unix systems out there. An example of Unix brain damage is a kluge in a mail server to recognise bare line feed (the Unix newline) as an equivalent form to the Internet standard newline, which is a carriage return followed by a line feed. Such things can make even a hardened jock weep.
- unix to unix copy — (networking, messaging) (uucp) A Unix utility program and protocol that allows one Unix system to send files to another via a serial line which may be a cable going directly from one machine's serial port to another's or may involve a modem at each end of a telephone line. Software is also available to allow uucp to work over Ethernet though there are better alternatives in this case, e.g. FTP or rcp for file transfer, SMTP for electronic mail or NNTP for news. The term is now also used to describe the large international network which uses UUCP to pass Usenet news and electronic mail, also known as "UUCPNET". See also cu, uuencode.
- urban exploration — a recreational activity in which people explore derelict urban structures such as abandoned sewers or underground railways or attempt to access areas which are closed to the public such as the roofs of skyscrapers
- vacuum extraction — applying suction to a baby's head during birth to help it emerge
- without exception — all included
- writ of execution — a writ ordering that a judgment be enforced