Kinesis
WordNet
noun
(1) A movement that is a response to a stimulus but is not oriented with respect to the source of stimulation
WiktionaryText
Etymology
From Ancient Greek κίνησις (kinesis) "motion, movement", from κινέω (kineo) "I move, I put in motion".
Noun
kinesis
- the movement of an organism in response to an external stimulus
- Kinesis, like a taxis, is a movement or activity of a cell or an organism in response to a stimulus. However, unlike taxis, the movement can be in any direction or even random. Its rate—that is, the frequency of turning or reorientation, or of activity—depends on the intensity of the stimulation.