cross ratio

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noun Geometry.

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

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Also called anharmonic ratio .

Origin of cross ratio

First recorded in 1880–85

cross-ra·ti·o, adjective

The Via Dolorosa ends at the Church of the Holy Sepulchre, and is marked by nine stations of the cross.
Oops! Jesus’ Last Steps Are in the Wrong Place|Candida Moss|January 6, 2015|DAILY BEAST
Carlisle writes that the Air Force would want a crew ratio of 10 to one for each drone orbit during normal everyday operations.
Exclusive: U.S. Drone Fleet at ‘Breaking Point,’ Air Force Says|Dave Majumdar|January 5, 2015|DAILY BEAST
During an emergency that ratio could be allowed to drop to 8.5 people per orbit.
Exclusive: U.S. Drone Fleet at ‘Breaking Point,’ Air Force Says|Dave Majumdar|January 5, 2015|DAILY BEAST
However, the Air Force is so strapped for people that the ratio has dropped below even that reduced level.
Exclusive: U.S. Drone Fleet at ‘Breaking Point,’ Air Force Says|Dave Majumdar|January 5, 2015|DAILY BEAST

If they were meaningful, we might have realized it before—surely one of these kids wore a cross, or a yarmulke, or a hijab?
Harry Potter and the Torah of Terror|Candida Moss, Joel Baden|January 4, 2015|DAILY BEAST
In cross-section the burrows varied from round (three inches in diameter) to oval (three inches high and four inches wide).
Summer Birds From the Yucatan Peninsula|Erwin E. Klaas
I cannot believe that God would think it necessary to come on earth as a man, and die on the Cross.
God and my Neighbour|Robert Blatchford
At Jaques Cartier they had but one batteau to cross the army over with, and were fired upon during the whole time by two frigates.
The Every Day Book of History and Chronology|Joel Munsell
Father Salvierderra said if we repined under our crosses, then a heavier cross would be laid on us.
Ramona|Helen Hunt Jackson
Pretty well for "a cross between an Astley's chariot, a flying machine and a treadmill."
Glances at Europe|Horace Greeley