SINCE 1828
dictionary
thesaurus
view recents

psilomelane

noun
Save Word
psi·​lo·​mel·​ane | \ ˌsīlōˈmeˌlān \
plural -s

Definition of psilomelane

: a basic oxide of barium and bivalent and quadrivalent manganese probably BaMnMn8O16(OH)4 — compare hollandite, coronadite

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 psilomelane

psil- + -melane

Keep scrolling for more

Learn More about psilomelane

Statistics for psilomelane

Cite this Entry

“Psilomelane.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/psilomelane. Accessed 24 Jan. 2021.

Comments on psilomelane

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

Show Comments  Hide Comments 

WORD OF THE DAY

insouciance

Listen to the pronunciation of insouciance

See Definitions and Examples »

Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

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