Periselenium

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The point of a body's elliptical orbit about the moon's centre of mass where the distance between the body and the centre of mass is at its minimum. uncountable

    "Hence, the Earth gravity allows the decrease of the particle energy from zero to a negative value and its capture by the moon to an elliptical orbit, e.g., with a periselenium of ~2,000 km and a high aposelenium of ~70,000h km."

Synonyms

All synonyms
periselene

Example

More examples

"Hence, the Earth gravity allows the decrease of the particle energy from zero to a negative value and its capture by the moon to an elliptical orbit, e.g., with a periselenium of ~2,000 km and a high aposelenium of ~70,000h km."

Etymology

From peri- + seleno- + -ium, Latin form of -ion.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.