noun ·Uncommon ·Advanced level

Definitions

Noun

1. 1
   A metallic chemical element (symbol Ru) with an atomic number of 44. countable, uncountable

   "Their latest catalyst includes some ruthenium."

2. 2
   a rare polyvalent metallic element of the platinum group; it is found associated with platinum wordnet
3. 3
   An atom of this element. countable

   "This reaction substitutes a ruthenium for an osmium."

Synonyms

All synonyms

atomic number 44goldironleadmetalru

Example

More examples

"Their latest catalyst includes some ruthenium."

Etymology

Ruthenia + -ium

Related phrases

ammonium ruthenium chlorideruthenium dioxideruthenium oxideruthenium redruthenium tetroxideruthenium trichlorideatomic number

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.