Uncanny-valley meaning

A range of appearances, mannerisms, and/or behaviors subtly different from humanoid in an otherwise humanoid figure that may cause negative reactions, such as fear, discomfort, or revulsion.
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Origin of uncanny-valley

  • uncanny +‎ valley, a calque of Japanese 不気味の谷 (bukimi no tani ぶきみのたに), from Middle Chinese 不 (pjuw "not") + 氣味 (kì-mjɨ̀j "taste and smell", by extension "sense", "sentiment") + Japanese の (no, noun modifier particle) + 谷 (たに tani "valley"). First used in 1970 by roboticist Masahiro Mori.

    From Wiktionary