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2.
A UNIX-based operating systems for Silicon Graphics Inc. (SGI)'s super computers, servers and workstations.
Irix is a good, stable OS, and my SGI-machine hasn't gone down for 180 days.
by venox September 13, 2003
 
1.
IRIX n. A variant of the UNIX Operating System designed by Silicon Graphics, Inc. to run on its MIPS processor based, IRIS graphical workstations.

Origin: Greek, meaning "Falcon." Also, a possible combination of the terms IRIS and UNIX, "Integrated Raster Imaging uniX."
My girlfriend sat on my face and made me toss her salad for 12 hours. She said it was because "You give that damn IRIX box more attention than me."
by Quinn Mallory January 27, 2006