Definition of cerous in US English:

cerous

adjective

  • Of cerium in its lower valency (3).

    • ‘The amount of cerous chloride is 5% or less, more preferably 2% or less on the basis of the weight of chromic oxide.’
    • ‘Generally cerous salts are yellow to reddish while ceric slats are white.’
    • ‘Cobalt is incorporated into the electrolyte in addition to the cerous ion.’
    • ‘Metallic cerium is prepared by metallothermic reduction techniques, such as by reducing cerous fluoride with calcium, or by electrolysis of molten cerous chloride or other cerous halides.’
    • ‘The fluorescence of the cerous ion in aqueous solution has been the subject of a number of studies 1-3.’

Pronunciation

cerous

/ˈsirəs//ˈsɪrəs/