periherm

English

Etymology

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

Noun

periherm (plural periherms)

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

Antonyms

• (antonym(s) of “a point in an orbit around the planet Mercury”): apoherm

See also

• periapsis
• perihelion
• perigee

References

• BepiColombo Mission [1]