quasicrystal

[ kwey-zahy-kris-tl, kwey-sahy‐, kwah-see‐, ‐zee‐ ]
/ ˌkweɪ zaɪˈkrɪs tl, ˌkweɪ saɪ‐, ˌkwɑ si‐, ‐zi‐ /

noun

a form of solid matter whose atoms are arranged like those of a crystal but assume patterns that do not exactly repeat themselves.

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Origin of quasicrystal

First recorded in 1985–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020