D defs.my
Entry 3 senses Webster, 1913

Regulus

/(-l?s)/ · Reg·u·lus · IPA
01 n. A petty king; a ruler of little power or consequence.
pl. Reguluses, Reguli ((-�z))
  1. 1.
    A petty king; a ruler of little power or consequence.
  2. 2.
    The button, globule, or mass of metal, in a more or less impure state, which forms in the bottom of the crucible in smelting and reduction of ores.(Chem. & Metal.)
  3. 3.
    A star of the first magnitude in the constellation Leo; -- called also the Lion's Heart.(Astron.) Also: Lion's Heart