Neptunian

[ nep-too-nee-uhn, -tyoo- ]

adjective

1. pertaining to Neptune or the sea.
2. pertaining to the planet Neptune.
3. (often lowercase) Geology. formed by the action of water.

Neptunian

/ 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

Other Words From

• trans-Nep·tuni·an adjective

Word History and Origins

Origin of Neptunian¹

First recorded in 1650–60; Neptune + -ian

Example Sentences

The densities jump up for the next to planets, a small hop to a Neptunian density and a big leap up to nearly Martian density.

From Popular-Science

Though the account is very interesting, I do not perceive its exact bearing on the Neptunian and Plutonian hypotheses.

From Project Gutenberg

In six Neptunian months a forest of graceful larches would spring up to a height of seventy or eighty feet.

From Project Gutenberg

But to admit the "Plutonic" origin of such widespread formations was practically to abandon the Neptunian hypothesis.

From Project Gutenberg

An instance of this tendency, drawn from physical science, is supplied in the Neptunian geology of Werter.

From Project Gutenberg

The Neptunian leader began to gesture again, and conveyed to Burl that they wanted to attack as soon as possible.

From Project Gutenberg

Related Words

• aquatic
• coastal
• deep-sea
• maritime
• naval
• saltwater
• seagoing