positive crystals

A form of positive crystal — 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.

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Meanings

noun
  1. pluralplural of positive crystal
Cite this entry
APA

positive crystals. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/positive%20crystals

MLA

“positive crystals.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/positive%20crystals. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “positive crystals,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/positive%20crystals.

Source: positive crystals on Wiktionary, CC BY-SA 4.0.