Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

ralstonite

noun
ral·ston·ite | \ˈrȯlztəˌnīt, -lst-\
plural -s

Definition of ralstonite 

: a mineral NaMgAl5F12(OH)6.3H2O consisting of a hydrous basic fluoride of aluminum, sodium, and magnesium in octahedral crystals

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 ralstonite

J. Grier Ralston, 19th century American clergyman + English -ite

Keep scrolling for more

Learn More about ralstonite

Share ralstonite

Resources for ralstonite

Cite Time Traveler Time Traveler! Explore the year a word first appeared

Dictionary Entries near ralstonite

rally the troops

raloxifene

ralph

ralstonite

RAM

ram

ram's-head

Statistics for ralstonite

Look-up Popularity

Comments on ralstonite

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

Show Comments  Hide Comments 

WORD OF THE DAY

brouhaha

a state of commotion or excitement

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Dictionary Devil

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!

Words at Play

Ask the Editors

Word Games