Definition of regulus in English:

regulus

noun

  • 1Chemistry
    archaic A metallic form of a substance obtained by smelting or reduction.

    • ‘This was smelted, which reduced the bulky and heavy copper ore to a much smaller and more valuable regulus, before transporting it to the English and Australian Copper Smelting Company at Port Adelaide or to England.’
    • ‘When it demolished the furnace in 1882 it recovered also some copper from stockpiled regulus.’
    • ‘He also bought the nearby smelting works at Scotts Creek to refine copper regulus produced at the Bremer mine.’
  • 2A petty king or ruler.

    • ‘The king left him as sub regulus whenever he was out of the country.’

Origin

Late 16th century: from Latin, diminutive of rex, reg- king; originally in the phrase regulus of antimony (denoting metallic antimony), apparently so named because of its readiness to combine with gold.

Pronunciation:

regulus

/ˈreɡyələs/

Definition of Regulus in English:

Regulus

proper noun

Astronomy
  • The brightest star in the constellation Leo. It is a triple system of which the primary is a hot dwarf star.

Origin

Latin, literally little king.

Pronunciation:

Regulus

/ˈreɡyələs/