What is of, pertaining to, or designating, the hill Collis Quirinalis, now Monte Quirinale (one of the seven hills of Rome), or a modern royal place situated upon it. Also used substantively called?

quirinal — Of, pertaining to, or designating, the hill Collis Quirinalis, now Monte Quirinale (one of the seven hills of Rome), or a modern royal place situated upon it. Also used substantively. (Webster's 1913.)

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