Merriam-Webster Logo
SINCE 1828
dictionary thesaurus view recents

pentahydrite

noun
Save Word
pen·​ta·​hy·​drite | \ ˌpentəˈhīˌdrīt \
plural -s

Definition of pentahydrite

: a mineral MgSO4.5H2O consisting of hydrous sulfate of magnesium isostructural with chalcanthite and containing less water than epsomite

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 pentahydrite

penta- + hydr- + -ite

Keep scrolling for more

Learn More about pentahydrite

Statistics for pentahydrite

Cite this Entry

“Pentahydrite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pentahydrite. Accessed 22 Feb. 2020.

Comments on pentahydrite

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

Show Comments  Hide Comments 

WORD OF THE DAY

pontificate

Listen to the pronounciation of pontificate

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

More Confusing Words—Quiz

  • cats on impossible timber
  • The magician ______ moved the selected card to the top of the deck.
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Add Diction

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