ro·​ma·​ni·​um | \ rōˈmānēəm \
plural -s

Definition of romanium

: an alloy consisting of aluminum having an admixture of less than one percent of tungsten together with a little copper, nickel, antimony, and tin

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!

First Known Use of romanium

1897, in the meaning defined above

History and Etymology for romanium

New Latin, from R. I. Roman, 19th century metallurgist, its inventor + New Latin -ium

Keep scrolling for more

Learn More about romanium

Time Traveler for romanium

Time Traveler

The first known use of romanium was in 1897

See more words from the same year

Statistics for romanium

Cite this Entry

“Romanium.” Dictionary, Merriam-Webster, Accessed 5 Aug. 2020.

Comments on romanium

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


Test Your Vocabulary

July 2020 Words of the Day Quiz

  • papercraft sunset
  • Which is a synonym of mien?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

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!