Definitions from Wiktionary (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 quartz and ice; as opposed to negative crystal: one in which this characteristic is reversed, such as Iceland spar or tourmaline.



▸ Words similar to positive crystal
▸ Usage examples for positive crystal

▸ Idioms related to positive crystal
▸ Wikipedia articles (New!)
▸ Words that often appear near positive crystal
▸ Rhymes of positive crystal

▸ Invented words related to positive crystal