cross ratio

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noun Geometry.

a ratio relating four points in the real or complex plane.

Nearby words

  1. cross one's mind,
  2. cross over,
  3. cross press,
  4. cross product,
  5. cross protection,
  6. cross reaction,
  7. cross reference,
  8. cross relation,
  9. cross river,
  10. cross river gorilla

Origin of cross ratio

First recorded in 1880–85

Also called anharmonic ratio.

Related formscross-ra·ti·o, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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