regulus, n.Definitions

A Regulus (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠the "little king" of metallurgy, the lump of metal formed beneath the slag in smelting, in which the sunken king of alchemy lived on.