akinesis

/ˌeɪkɪˈnisɪs/
noun
  1. The absence or loss of movement; a state of motionlessness. In medical contexts, often used interchangeably with akinesia.
    • The researcher studied akinesis in animals as a survival response to threats.
    • Akinesis of the heart wall can be detected using an echocardiogram.
    • The frog entered a state of akinesis when placed on its back, playing dead to avoid predators.
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