nastic

[nas-tik]

adjective Botany.

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

1900–10; < Greek nast(ós) pressed close, stamped down, firm (equivalent to nad- stem of nássein to press, squeeze + -tos past participle suffix, with dt > st) + -ic

-nastic

a combining form occurring in adjectives corresponding to nouns ending in -nasty: hyponastic.

Origin of -nastic

see origin at nastic

Examples from the Web for nastic

Historical Examples of nastic

There is no line of demarcation between tropic and nastic movements.
Life Movements in Plants, Volume II, 1919
Sir Jagadis Chunder Bose
The employment of the term 'nastic' is, however, convenient when used in a well-defined and restricted sense.
Life Movements in Plants, Volume II, 1919
Sir Jagadis Chunder Bose
No sharp distinction can therefore be made between the movements of growth and of variation, between tropic and nastic curvatures.
Life Movements in Plants, Volume II, 1919
Sir Jagadis Chunder Bose