ruthenium

play
noun ru·the·ni·um \rü-ˈthē-nē-əm\

Definition of ruthenium

  1. :  a rare hard silvery-white metallic element occurring in platinum ores and used especially as a catalyst and to harden alloys — see element table

Recent Examples of ruthenium from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ruthenium'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of ruthenium

New Latin, from Medieval Latin Ruthenia Ruthenia


First Known Use: 1829


Medical Dictionary

ruthenium

play
noun ru·the·ni·um \rü-ˈthē-nē-əm\

Medical Definition of ruthenium

  1. :  a hard brittle grayish polyvalent rare metallic element occurring in platinum ores and used in hardening platinum alloys—symbol Ru; see element table


Learn More about ruthenium


Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

clear to the understanding

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
  • Which is a synonym of garner?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

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!