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nastic

[nas-tik]
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adjective Botany.
  1. of or showing sufficiently greater cellular force or growth on one side of an axis to change the form or position of the axis.
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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

  1. a combining form occurring in adjectives corresponding to nouns ending in -nasty: hyponastic.
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Origin of -nastic

see origin at nastic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for nastic

Historical Examples

  • 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.

  • No sharp distinction can therefore be made between the movements of growth and of variation, between tropic and nastic curvatures.