nastic
/ˈnæstɪk/
adjective
- Describing a plant movement that is in response to a stimulus but not directed toward or away from it, such as opening or closing of flowers.
- Nastic movements in plants are different from tropisms because they don't depend on the direction of the stimulus.
- The nastic movement of a Venus flytrap closing its leaves is triggered by touch.
- Some flowers show nastic responses by opening during the day and closing at night.
Antonyms