- 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 radius
Symbol: sr
| 单词 | steradian |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 ste•ra•di•an (stə rā′dē ən),USA pronunciation n. [Geom.]
Collins Concise English Dictionary © HarperCollins Publishers:: steradian /stəˈreɪdɪən/ n
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