noun
- Roman mythology. ( god of the sea; counterpart of Greek Poseidon)
- A giant planet with a ring of ice particles; the 8th planet from the sun is the most remote of the gas giants.
- usage: "the existence of Neptune was predicted from perturbations in the orbit of Uranus and it was then identified in 1846"
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). neptune. Retrieved September 20, 2026, from http://smartdefine.org/neptune/definitions/1227210 |
| Chicago | WordNet. 2010. "neptune" http://smartdefine.org/neptune/definitions/1227210 (accessed September 20, 2026). |
| Harvard | WordNet 2010, neptune, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/neptune/definitions/1227210>. |
| MLA | WordNet. "neptune" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/neptune/definitions/1227210> |