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   uncanny valley

   noun

   • 1. used in reference to the phenomenon whereby a computer-generated figure or humanoid robot bearing a near-identical resemblance to a human being arouses a sense of unease or revulsion in the person viewing it: "anyone attempting to build a believable human facsimile also has to beware of the uncanny valley"

   Word Origin 1970s: from a translation of Japanese bukimi no tani, coined by the roboticist Masahiro Mori, who created a graph that plotted the emotional response of a human being to a robot against the increase in the perceived realism of a robot; the graph showed a significant dip at the point where the robot's resemblance to a human is perceived to be almost exact.

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