Queried GO term:

  idGO:0046135   Detailed information
  namepyrimidine nucleoside catabolic process
  namespacebiological_process
  def"The chemical reactions and pathways resulting in the breakdown of one of a family of organic molecules consisting of a pyrimidine base covalently bonded to a sugar ribose (a ribonucleoside) or deoxyribose (a deoxyribonucleoside)." [GOC:ai]
  subsetgosubset_prok
  is_aGO:0006213 ! pyrimidine nucleoside metabolic process
  is_aGO:0009164 ! nucleoside catabolic process
  is_aGO:0072529 ! pyrimidine-containing compound catabolic process

No monarch genes has the input GO term: GO:0046135.