/ Dictionary / Index N nastic: Meaning and Definition of Find definitions for: nas•tic Pronunciation: (nas'tik), [key] — adj. Bot. of or showing sufficiently greater cellular force or growth on one side of an axis to change the form or position of the axis. -nastic Pronunciation: [key] a combining form occurring in adjectives corresponding to nouns ending inhyponastic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Nast nasturtium Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language