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 There is only one thirteen-letter word containing IREFRINGEN| BIREFRINGENCE | • birefringence n. (Physics) The splitting of a ray of light into two parallel rays of perpendicular polarization by passage… • BIREFRINGENCE n. the refraction of light in an anisotropic material (as calcite) in two slightly different directions to form two rays. |  
 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America. Definitions are short excerpt from the WikWik.org and 1Word.ws. 
 See this list for:- English Wiktionary: 2 words
 - Scrabble in French: 3 words
 - Scrabble in Spanish: no word
 - Scrabble in Italian: no word
 - Scrabble in German: no word
 - Scrabble in Romanian: 3 words
 
 
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