regulus
noun
Regulus, a first magnitude star in the constellation Leo.
regulus
1 American
[reg-yuh-luhs]
/ ˈrɛg jə ləs /
noun
-
reguluses,
plural
-
reguli
plural
-
Astronomy. Regulus, a first magnitude star in the constellation Leo.
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Metallurgy.
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the metallic mass that forms beneath the slag at the bottom of the crucible or furnace in smelting ores.
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an impure intermediate product obtained in smelting ores.
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Regulus
2
American
[reg-yuh-luhs]
/ ˈrɛg jə ləs /
noun
regulus
1
British
/ ˈrɛɡjʊləs /
noun
Regulus
2
British
/ ˈrɛɡjʊləs /
noun
Regulus
3
British
/ ˈrɛɡjʊləs /
noun
Regulus
Scientific
/ rĕg′yə-ləs /
Other Word Forms
Derived Forms
Inflected Forms
Nouns
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
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Later than Agricola these methods of parting bullion by converting the silver into a sulphide and carrying it off in a regulus took other forms.
From De Re Metallica, Translated from the First Latin Edition of 1556 by Georgius Agricola
A chemical compound so called from its power of dissolving gold. regulus of cobalt: early chemical term referring to the metallic mass of an ore.
From The Short-story by William Patterson Atkinson
The test to be applied to the regulus by way of cupellation and parting of a sample with nitric acid, requires no explanation.
From De Re Metallica, Translated from the First Latin Edition of 1556 by Georgius Agricola
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 Georgius Agricola
The ores, too poor for shipment, are reduced locally, and the regulus exported to London.
From British Borneo Sketches of Brunai, Sarawak, Labuan, and North Borneo by Sir W. H. (William Hood) Treacher
Regulus aims this year to start work on a site to produce triple-base propellant, a particularly powerful variant that the U.S. hasn’t produced since 1986, Somerindyke said.
From The Wall Street Journal ● Jul. 28, 2026
Some standouts: Regulus Therapeutics went up 120%; 89bio went up 85%; Chimerix gained 69% and Intra-Cellular Therapies rose 57%.
From MarketWatch ● Nov. 3, 2025
The trio will shine brightly, but Venus will outshine the other two, and Regulus will be emanating a blue-white hue.
From Los Angeles Times ● Dec. 17, 2024
The meteors will appear to radiate from the head of the lion, just above Regulus.
From BBC ● Nov. 17, 2024
Whereas Sirius had sought to advertise his difference from the rest of the family, Regulus had striven to emphasize the opposite.
From "Harry Potter and the Deathly Hallows" by J.K. Rowling
The Vulgate has it, "in caverna reguli;" which, however, is not classic Latin.
From The Grammar of English Grammars by Goold Brown
These ealdermen, or earls, were honoured with titles of reguli subreguli, principes, patricii, and some times rex.
From The Mirror of Literature, Amusement, and Instruction Volume 13, No. 357, February 21, 1829 by Various
Mr. Ray himself had no knowledge of this bird, but received his account from Mr. Johnson, who apparently confounds it with the reguli non cristati, from which it is very distinct.
From The Natural History of Selborne, Vol. 1 by Henry Morley
In the middle of the ninth century, Harold Harfager, one of the reguli of Norway, subdued the other petty rulers, and made himself king of the whole country.
From Notes and Queries, Number 182, April 23, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. by George Bell
Mr. Ray himself had no knowledge of this bird, but received his account from Mr. Johnson, who apparently confounds it with the reguli non cristati, from which it is very distinct.
From The Natural History of Selborne by Gilbert White
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