radical axis

American  

noun

Geometry.

1. the line such that tangents drawn from any point of the line to two given circles are equal in length.

---

radical axis British  

noun

1. a line from any point of which tangents to two given circles are of equal length. It is the line joining the points of intersection of two circles

---

Etymology

Origin of radical axis

First recorded in 1840–50

Example Sentences

“The idea,” he said, “was to see if we could drive a wedge in the radical axis of Iran-Syria-Hezbollah” by taking Syria out of the equation.

From New York Times

One country after the next joined the radical axis.

From New York Times

Neither he nor Mr. Barak proscribed a specific plan against Syria, but both noted its connections to Iran and Hezbollah, the heavily armed Shiite Muslim group, a relationship that Mr. Barak described as “a radical axis” and “an unholy alliance.”

From New York Times

The intersections which lie on the radical axis are two out of the four intersections of the two circles.

From Project Gutenberg

Instead, Israel sees a potential benefit, saying that the collapse of his government would deal a severe blow to the “radical axis,” including enemies such as Iran, the Lebanese Shiite organization Hezbollah and Palestinian militant groups like Hamas.

From New York Times