Definition of perilune in English:

perilune

Line breaks: peri|lune
Pronunciation: /ˈpɛrɪluːn
 
/

noun

[mass noun]
  • The point at which a spacecraft in lunar orbit is closest to the moon. The opposite of apolune.
    More example sentences
    • SMART - 1 reached its closest point to the lunar surface so far - its first ‘perilune’ - at an altitude of about 5000 kilometres at 18: 48 Central European Time on 15 November.

Origin

1960s: from peri- 'around' + Latin luna 'moon', on the pattern of perigee.

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Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space