/ Dictionary / Index Q quasicrystal: Meaning and Definition of Find definitions for: qua•si•crys•tal Pronunciation: (kwā"zī-crys'tl, kwā"sī-, kwä"sē-, -zē-), [key] a form of solid matter whose atoms are arranged like those of a crystal but assume patterns that do not exactly repeat themselves. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. quasi contract quasi-judicial Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language