steradian
[ stuh-rey-dee-uhn ]
/ stəˈreɪ di ən /
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noun Geometry.
a solid angle at the center of a sphere subtending a section on the surface equal in area to the square of the radius of the sphere. Abbreviation: sr
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Words nearby steradian
steptoe, step turn, step-up, stepwise, -ster, steradian, sterco-, stercobilin, stercolith, stercoraceous, stercoraceous vomiting
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British Dictionary definitions for steradian
steradian
/ (stəˈreɪdɪən) /
noun
an SI unit of solid angle; the angle that, having its vertex in the centre of a sphere, cuts off an area of the surface of the sphere equal to the square of the length of the radiusSymbol: sr
Word Origin for steradian
C19: from stereo- + radian
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Scientific definitions for steradian
steradian
[ stĭ-rā′dē-ən ]
A unitless measure of solid angles. A solid angle projecting from the center of a sphere and cutting its surface has a measure ofsr2 steradians, where s is the surface area of the sphere cut out by the solid angle, and r is the radius of the sphere. See also radian.
The American Heritage® Science Dictionary
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