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Webster 1913 Edition

Perihelium

{

Perˊi-hel′ion

,

Perˊi-he′li-um

, }

Noun.

;

pl.

Perihelia

(#)

.

[NL., fr. Gr.

περί

about, near +

ἤλιοσ

the sun.]

(Astron.)

That point of the orbit of a planet or comet which is nearest to the sun; – opposed to

aphelion

.