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Definitions positive crystal noun  (optics) a doubly refracting crystal in which the index of refraction for the extraordinary ray is greater than for the ordinary ray, and the former is refracted nearer to the axis than the latter, such as as quartz and ice; as opposed to negative crystal: one in which this characteristic is reversed, such as Iceland spar or tourmaline. Supplemental Details:Sponsor an extended definition for positive crystal for as little as $10 per month. Click here to contact us.        Find:   Words Starting With:   Words Ending With:   Words Containing:   Words That Match:    Translate Into:    Dutch   French   German    Italian   Spanish     Show 51015202550100250500 results per page. Browse the Dictionary A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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