Etymology of the English word steradian
the English word
steradianderived from the English word
radianderived from the English word
radiusderived from the Latin word
radius (rod, spoke; ray; rod)
using the English suffix
-anusing the English prefix
stereo-derived from the Greek word
stereos, στερεός (stiff; solid, stable)
derived from the Proto-Indo-European root
*ster-Date
The earliest known usage of steradian in English dates from the 19th century.
