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We found 8 dictionaries that define the word cross-ratio:

General (3 matching dictionaries)
  1. cross-ratio: Wiktionary
  2. cross-ratio: Dictionary.com
  3. Cross-ratio: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)
  1. Cross-ratio: Encyclopedia

Medicine (1 matching dictionary)
  1. Cross-ratio: Medical dictionary

Science (3 matching dictionaries)
  1. A Glossary of Mathematical Terms (No longer online)
  2. Cross-Ratio: Eric Weisstein's World of Mathematics
  3. cross-ratio: PlanetMath Encyclopedia

Definitions from Wiktionary (cross-ratio)

noun:  (geometry) A special number associated with an ordered quadruple of collinear points, particularly points on a projective line, and preserved by the fractional linear transformations.

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