magnetic constant

noun

1. M0. Also called: absolute permeability. the permeability of free space, which has the value 4π × 10 ^–7 henry per metre

Example Sentences

Throughout, the character was a magnetic constant; the show’s problem was always finding villains worthy of him.

From New York Times

Magnetic constant, Hansen’s observations, I, 243.

From Project Gutenberg

Hansen had also at stated periods to take observations to determine the magnetic constant in this unknown region.

From Project Gutenberg