A term coined in the 1990's, referring to a sense of nausea and disorientation similar to seasickness or car sickness, caused by graphical lag in virtual reality helmets, such as Virtuality arcade systems. When turning one's head the display would lag a fraction of a second behind, resulting in a disagreement between the wearer's sense of balance and sense of sight. Cybersickness is a probable cause for much of the rapid loss of interest in immersive cyberspace and, to a lesser degree, the cyberpunk movement.
I tried playing Dactyl Nightmare on an old Virtuality system, but it nearly made me puke from cybersickness after a couple minutes.
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