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Uncanny valley

Uncanny valley: "The uncanny valley is a hypothesis in the field of robotics[1] and 3D computer animation, which holds that when human replicas look and act almost, but not perfectly, like actual human beings, it causes a response of revulsion among human observers. The "valley" in question is a dip in a proposed graph of the positivity of human reaction as a function of a robot's human likeness."

Ogive

Ogive: "An ogive ('Oh-jive') is the roundly tapered end of a two-dimensional or three-dimensional object."