neptunite

noun
nep·​tun·​ite | \ -ˌnīt \
plural -s

Definition of neptunite

: a mineral (Na,K)2(Fe,Mn)TiSi4O12 consisting of a silicate of iron, manganese, potassium, sodium, and titanium

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for neptunite

Swedish neptunit, from Latin Neptunus Neptune + Swedish -it -ite

Keep scrolling for more

Learn More about neptunite

Statistics for neptunite

Cite this Entry

“Neptunite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neptunite. Accessed 20 Oct. 2020.

Comments on neptunite

What made you want to look up neptunite? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!