- of or showing sufficiently greater cellular force or growth on one side of an axis to change the form or position of the axis.
Origin of nastic
- a combining form occurring in adjectives corresponding to nouns ending in -nasty: hyponastic.
Origin of -nastic
Examples from the Web for nastic
Historical Examples of nastic
There is no line of demarcation between tropic and nastic movements.
No sharp distinction can therefore be made between the movements of growth and of variation, between tropic and nastic curvatures.
The employment of the term 'nastic' is, however, convenient when used in a well-defined and restricted sense.