regulus

¹ American  

[reg-yuh-luhs] / ˈrɛg yə ləs /

noun

plural

reguluses, reguli

1. Astronomy. Regulus, a first magnitude star in the constellation Leo.

2. Metallurgy.

   1. the metallic mass that forms beneath the slag at the bottom of the crucible or furnace in smelting ores.

   2. an impure intermediate product obtained in smelting ores.

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Regulus ² American  

[reg-yuh-luhs] / ˈrɛg yə ləs /

noun

1. Marcus Atilius died 250? b.c., Roman general.

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regulus ¹ British  

/ ˈrɛɡjʊləs /

noun

1. impure metal forming beneath the slag during the smelting of ores

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Regulus ² British  

/ ˈrɛɡjʊləs /

noun

1. the brightest star in the constellation Leo. Visual magnitude: 1.3; spectral type: B8; distance: 69 light years

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Regulus ³ British  

/ ˈrɛɡjʊləs /

noun

1. Marcus Atilius (ˈmɑːkəs əˈtɪlɪəs). died ?250 _bc , Roman general; consul (267; 256). Captured by the Carthaginians in the First Punic War, he was sent to Rome on parole to deliver the enemy's peace terms, advised the Senate to refuse them, and was tortured to death on his return to Carthage

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Regulus Scientific  

/ rĕg′yə-ləs /

1. A bright triple star in the constellation Leo, with an apparent magnitude of 1.35. Scientific name: Alpha Leonis.

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Other Word Forms

• reguline adjective

Etymology

Origin of regulus

First recorded in 1550–60; from Latin rēgulus literally, “little king” (diminutive of rēx ); in early chemistry, “antimony,” so called because it readily combines with gold (the king of metals); see -ule

Example Sentences

When gold is parted from sixty-six librae of silver, the silver, copper, and sulphur regulus weighs one hundred and thirty-two librae.

From De Re Metallica, Translated from the First Latin Edition of 1556 by Agricola, Georgius

The regulus of arsenic is of a yellow colour, subject to tarnish or grow black, by exposure to the air, very brittle, and of a laminated texture.

From Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry by Priestley, Joseph

What is commonly called arsenic is the calx of a semi-metal called the regulus of arsenic.

From Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry by Priestley, Joseph

For example, silver in bullion and in ores; copper precipitates or regulus, and copper ores and slags; and "black tin" and tin ores.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius

For clarity we introduced the term "regulus" for the Latin mistura.

From De Re Metallica, Translated from the First Latin Edition of 1556 by Agricola, Georgius