noun
: a reversible change in position of a plant part due to a change in turgor pressure of various cells (as in sleep movements) — compare nyctitropism
noun
: a reversible change in position of a plant part due to a change in turgor pressure of various cells (as in sleep movements) — compare nyctitropism
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012