Definitions for kinesiskɪˈni sɪs, kaɪ-
Random House Webster's College Dictionary
ki•ne•siskɪˈni sɪs, kaɪ-(n.)
the movement of an organism in response to a stimulus, as light.
Origin of kinesis:
1900–05; < Gk kinēsis movement
a combining form with the meaning “movement, activity,” often used with the more particular senses “reaction to a stimulus” (photokinesis), “movement without an apparent physical cause” (telekinesis), “activity within a cell” (karyokinesis).
Ref: Compare -kinesia.
Origin of -kinesis:
< Gk -kīnēsis; see kinesis
a movement that is a response to a stimulus but is not oriented with respect to the source of stimulation
the movement of an organism in response to an external stimulus
Origin: From κίνησις.
U.S. National Library of Medicine
Locomotor behavior not involving a steering reaction, but in which there may be a turning random in direction. It includes orthokinesis, the rate of movement and klinokinesis, the amount of turning, which are related to the intensity of stimulation.