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Meaning of quasicrystal

qua•si•crys•tal

Pronunciation: (kwā"zī-crys'tl, kwā"sī-, kwä"sē-, -zē-), [key]
  1. 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.