Definition of rutilant in US English:

rutilant

adjective

literary
  • Glowing or glittering with red or golden light.

    ‘rutilant gems’
    • ‘Diana Rigg cuts a fine figure as Agrippina and, despite a ragingly rutilant Louise Brooks wig, as Phèdre.’
    white-hot, intensely hot, red-hot, burning, fiery, on fire, blazing, ablaze, aflame
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Origin

Late Middle English: from Latin rutilant- ‘glowing red’, from the verb rutilare, from rutilus ‘reddish’.

Pronunciation

rutilant

/ˈro͞odələnt/