A star of the first magnitude in the constellation Leo; -- called also the Lion's Heart.

A benefic Fixed Star in the 30th degree of Leo. The most royal of the four Royal Stars, aka Cor Leonis, the Lion's Heart.

Regulus (α Leo / α Leonis / Alpha Leonis) is the brightest star in the constellation Leo and one of the brightest stars in the nighttime sky.

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.

The metallic component refined from an ore. Most often applied by Newton and other chymists to metallic antimony or alloys thereof.

A metal was formerly called the regulus of the ore from which it was reduced [ Scheele]; " regulus" (without further specification) meant regulus of antimony ( i.e., antimony in modern nomenclature). [ Lavoisier

Regulus (also known as Bulzeeb) is a villain in the computer game series Bomberman, first appearing in Bomberman 64 as Regulus, and Bomberman 64: The Second Attack as Bulzeeb. He wears blue, and later black armor that closely resembles a jet in shape.

a genus of birds of the family Sylviidae including kinglets

Regulus is a Prolog-based toolkit for building spoken dialogue systems.

A petty king; a ruler of little power or consequence.