rutilant
Shining or glowing with a red colour or light.
figuratively, literary
[S]tately Hyperion or the lordly ſonne, the moſt rutilant planet of the ſeuẽ, in Lent when Heralius herring enters into his chiefe reign and ſcepterdome, ſkippeth and danſeth[,] the goats iumpe on the earth for ioy of his entrance.
Where it comes from
From Late Middle English rutilaunt (“shining with a gold or red colour”), from rutilāns (“reddening”), an adjective use of the present participle of rutilō (“to redden”) (from rutilus (“(yellowish) red”), from Proto-Indo-European *h₁rewdʰ- (“red”)). The English word is cognate with Italian rutilante, Portuguese rutilante, Spanish rutilante.
Adapted from the Wiktionary entry rutilant (CC BY-SA 4.0).