• synonyms

cross ratio

noun Geometry.
  1. a ratio relating four points in the real or complex plane.
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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. 2018

Examples from the Web for cross ratio

Historical Examples of cross ratio