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词汇 negative crystal
释义

Definition of negative crystal in English:

negative crystal

noun
  • 1Optics a crystal in which the index of refraction is greater for the ordinary than the extraordinary ray.

  • 2Geology a cavity having the shape of a crystal within a mineral mass.

Origin

Mid 19th century; earliest use found in David Brewster (1781–1868), natural philosopher and academic administrator.

Definition of negative crystal in US English:

negative crystal

noun
  • 1Optics a crystal in which the index of refraction is greater for the ordinary than the extraordinary ray.

  • 2Geology a cavity having the shape of a crystal within a mineral mass.

Origin

Mid 19th century; earliest use found in David Brewster (1781–1868), natural philosopher and academic administrator.

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