frequency of occurrence per specified volume of space.
| 单词 | θ748 |
| 释义 | the world > the universe > star > star-matter > [noun] > space density (2) space density1923 frequency of occurrence per specified volume of space. over-density1979 Astronomy. Greater density in a region of space than the average; a region so characterized, esp. as favouring star formation. |
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