perturbation
noun /ˌpɜːtəˈbeɪʃn/
/ˌpɜːrtərˈbeɪʃn/
- [uncountable] (formal) the state of feeling anxious about something synonym alarm
- [countable, uncountable] (specialist) a small change in the quality, behaviour or movement of something
- temperature perturbations
Word Originlate Middle English: from Latin perturbatio(n-), from the verb perturbare ‘disturb greatly’, from per- ‘completely’ + turbare ‘disturb’.