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periheliumPERIHE'LIUM, n. [Gr. about, and the sun.] That part of the orbit of a planet or comet, in which it is at its least distance from the sun; opposed to aphelion. |
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periheliumPERIHE'LIUM, n. [Gr. about, and the sun.] That part of the orbit of a planet or comet, in which it is at its least distance from the sun; opposed to aphelion. |