Definition of septivalent in US English:

adjective

• another term for heptavalent

  Example sentences

  • ‘In general, manganese ions are found in different valence states from divalent to septavalent.’
  • ‘Vanadium oxides that are in the higher oxidation state, e.g. pentavalent and septavalent oxides of vanadium and complexes thereof have melting points from about 1,200° to about 1,300° F.’