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a combining form with the meaning “nastic pressure,” of the kind or in the direction specified by the initial element:
Origin of -nasty
< Greek nast(ós) pressed close (see nastic) + -y3 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for -nasty


combining form
indicating a nastic movement to a certain stimulus: nyctinasty
Derived Forms
-nastic, combining_form:in_adjective
Word Origin
from Greek nastos pressed down, close-pressed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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