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Synonyms

Neptunian

American  
[nep-too-nee-uhn, -tyoo-] / nɛpˈtu ni ən, -ˈtyu- /

adjective

  1. pertaining to Neptune or the sea.

  2. pertaining to the planet Neptune.

  3. (often lowercase) formed by the action of water.


Neptunian British  
/ nɛpˈtjuːnɪən /

adjective

  1. of or relating to the Roman god Neptune or the sea

  2. of, occurring on, or relating to the planet Neptune

  3. geology (of sedimentary rock formations such as dykes) formed under water

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • trans-Neptunian adjective

Etymology

Origin of Neptunian

First recorded in 1650–60; Neptune + -ian

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Dr. Hammel also thinks a glimpse of Hippocampus, an eighth Neptunian moon, is pictured just above the planet.

From New York Times • Sep. 21, 2022

There are four main types of exoplanets: Neptunian, gas giant, super-Earth and terrestrial.

From Salon • Sep. 13, 2022

I, ever a Neptunian, would haunt it, too.”

From Seattle Times • Nov. 11, 2021

The Neptunian station was a grey wheel against the void.

From Nature • Aug. 23, 2016

As they moved through the ship it was like walking in the treasure house of a Neptunian robber baron.

From Before Egypt by Jarvis, E. K.