1. neptunian - Noun
2. neptunian - Adjective
Of or pertaining to the ocean or sea.
Formed by water or aqueous solution; as, Neptunian rocks.
Alt. of Neptunist
Source: Webster's dictionary[On a fabricated tabloid story]The Neptunian underworld king unleashed a barrage of eels from his abdomen and each of the eels was carrying a zippo lighter and as they flew by they spelt across the sky in fire 'Tara can a borrow your eyeliner please? Russell Brand
A. Barucci Trans Neptunian Objects’ surface properties, IAU Symposium No. 229, Asteroids, Comets, Meteors, Aug 2005, Rio de Janeiro Very red objects present a steep slope, reflecting much more in red and infrared. Source: Internet
Triton's orbit precesses forward relative to Neptune's spin with a period of about 678 Earth years (4.1 Neptunian years), making its Neptune-orbit-relative inclination vary between 127° and 180° and in the past, to 173°. Source: Internet
Pluto has a 3:2 resonance with Neptune, meaning that Pluto orbits twice round the Sun for every three Neptunian orbits. Source: Internet