Each of the three regions of air (lower, middle, and upper) which medieval cosmologists believed to surround the earth. Obsolete. rare.
| 单词 | θ8813 |
| 释义 | the world > the earth > weather and the atmosphere > [noun] > of earth > a layer of (1) peripherya1393 Each of the three regions of air (lower, middle, and upper) which medieval cosmologists believed to surround the earth. Obsolete. rare. |
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