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In condensed matter physics and materials science , an " amorphous " ( from the Greek " a " , without , " morphé " , shape , form ) or " non-crystalline solid " is a solid that lacks the long-range order that is characteristic of a crystal .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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