Emily Dickinson Lexicon
Definition for PER-I-HEL-ION, or PER-I-HE'LI-UM
PE-RIG'Y-NOUSPER-I-HEX-A-HE'DRAL
PER-I-HEL-ION, or PER-I-HE'LI-UM, n. [G. περι, about, and ἡλιος, the sun.]
That part of the or bit of a planet or comet, in which it is at its least distance from the sun; opposed to aphelion. Encyc.
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