Usually means: Related to the planet Neptune.
Definitions Related words Phrases Mentions History
We found 15 dictionaries that define the word Neptunian:

General (13 matching dictionaries)
  1. Neptunian: Merriam-Webster
  2. Neptunian: Oxford Learner's Dictionaries
  3. Neptunian: Collins English Dictionary
  4. Neptunian, neptunian: Wordnik
  5. Neptunian, neptunian: Wiktionary
  6. Neptunian: Infoplease Dictionary
  7. Neptunian: Dictionary.com
  8. Neptunian: Online Plain Text English Dictionary
  9. neptunian: Webster's Revised Unabridged, 1913 Edition
  10. Neptunian: AllWords.com Multi-Lingual Dictionary
  11. neptunian: Webster's 1828 Dictionary
  12. neptunian: FreeDictionary.org
  13. Neptunian: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. Neptunian: Encyclopedia

Medicine (1 matching dictionary)
  1. online medical dictionary (No longer online)

(Note: See neptune as well.)

Definitions from Wiktionary (Neptunian)

adjective:  (Roman mythology) Of or pertaining to Neptune, the Roman god of fresh water and the sea, the counterpart of the Greek god Poseidon.
adjective:  (by extension, rare) Of or pertaining to water or the sea.
adjective:  (by extension, geology) Formed by the action of water.
adjective:  (by extension, geology, historical) Of, pertaining to, or supporting Neptunism (“a discredited theory that rocks were formed from the crystallisation of minerals in the early Earth's oceans”).
noun:  (obsolete) A sailor.
noun:  (geology, historical) A proponent of Neptunism.
adjective:  (astrology) Pertaining to the astrological influence of the planet Neptune.
adjective:  (astronomy) Of or pertaining to the planet Neptune.
noun:  (astrology) A person under the astrological influence of the planet Neptune.
noun:  (chiefly science fiction) An (imaginary) inhabitant of the planet Neptune.
adjective:  Alternative letter-case form of Neptunian [(Roman mythology) Of or pertaining to Neptune, the Roman god of fresh water and the sea, the counterpart of the Greek god Poseidon.]
noun:  Alternative letter-case form of Neptunian [(obsolete) A sailor.]

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