Periherm Definition

noun

(astronomy) In an orbit around the planet Mercury, the point that is closest to Mercury.

Wiktionary

Other Word Forms of Periherm

Noun

Singular:
periherm
Plural:
periherms

Origin of Periherm

  • From peri- +‎ Ἑρμῆς (Hermes, “Mercury”).

    From Wiktionary

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periherm