Merriam-Webster Logo
SINCE 1828
dictionary
thesaurus
view recents

seybertite

noun
Save Word
sey·​bert·​ite | \ ˈsībə(r)tˌīt \
plural -s

Definition of seybertite

: a basic aluminosilicate Ca(Mg,Al)3(Al,Si)4(O,OH)12 of the clintonite group consisting of calcium, magnesium, and aluminum, occurring in monoclinic crystals and foliated masses and having a reddish brown, copper red, or yellowish color and submetallic luster (hardness 4–5, specific gravity 3–3.1)

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 seybertite

French, from Henry Seybert †1883 American mineralogist + French -ite

Keep scrolling for more

Learn More About seybertite

Statistics for seybertite

Cite this Entry

“Seybertite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seybertite. Accessed 17 Jun. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

harry

Listen to the pronunciation of harry

See Definitions and Examples »

Test Your Vocabulary

Name that Thing: Dog Breeds

  • any of a breed of small compact heavy-boned dogs developed in france and having erect ears
  • Name that dog!
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