Collins Concise English Dictionary © HarperCollins Publishers::
RU abbreviation for
  1. Rugby Union
WordReference Random House Unabridged Dictionary of American English © 2026
Ru, [Symbol, Chem.]
  1. Chemistryruthenium.

Collins Concise English Dictionary © HarperCollins Publishers::
Ru the chemical symbol for
  1. ruthenium
'RU' also found in these entries (note: many are not synonyms or translations):

Forum discussions with the word(s) "RU" in the title:


Look up "RU" at Merriam-Webster
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