poly·​crase | \ -āz \
plural -s

Definition of polycrase

: a mineral (Y,Ca,Ce,U,Th)(Ti,Cb,Ta)2O6 consisting of a columbate and titanate of the metals of the yttrium group that is isomorphous with euxenite (hardness 5–6, specific gravity 5)

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 polycrase

German polykras, from poly- + -kras (from Greek krasis mixing, combination)

Keep scrolling for more

Learn More about polycrase

Statistics for polycrase

Cite this Entry

“Polycrase.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polycrase. Accessed 9 Jul. 2020.

Comments on polycrase

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


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

A More Exception(al) Quiz

  • hot dog  hot dog  hot dog  hot dog cat
  • Which of the following words is not a synonym for ‘a young person’?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

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

Love words? Need even more definitions?

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