Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

-nasty Also -nastic.

Nastic movement.

[Greek nastos, squeezed together, plus -y3.]

In botany, a nastic movement is one made by a plant in response to an external stimulus which does not dictate the direction of the movement (one that does is a tropism); an example is the opening of flowers in response to increasing temperature. A few nouns indicate types of nastic behaviour: epinasty (Greek epi, upon, near to), the bending downward of a part of a plant caused by increased growth on its upper surface; nyctinasty (Greek nux, nukt-, night), periodic movement of flowers or leaves caused by nightly alterations in light intensity or temperature; seismonasty (Greek seismos, earthquake), a movement made in response to a mechanical shock. Related adjectives are formed using -nastic: hyponastic, nyctinastic,

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