Meanings
adjectivecis-Neptunian (not comparable)
- not comparableastronomyRelating to an astronomical body found within the orbit of Neptune.
Within the orbit of Neptune, cis-Neptunian bodies include the terrestrial and large gaseous planets, along with a variety of minor bodies: planetary moons, asteroids, and comets.
2018, Michael Perryman, The Exoplanet Handbook, Cambridge University Press, →ISBN, page 684
Origin
From cis- + Neptunian; compare trans-Neptunian.
Full word history & related roots →Cite this entry
APA
cis-Neptunian. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/cis-Neptunian
MLA
“cis-Neptunian.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/cis-Neptunian. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “cis-Neptunian,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/cis-Neptunian.
Source: cis-Neptunian on Wiktionary, CC BY-SA 4.0.