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regulus

[reg-yuh-luhs]

Origin

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noun, plural reg·u·lus·es, reg·u·li

[-lahy] .

(initial capital letter) Astronomy. a first magnitude star in the constellation Leo.

Metallurgy.

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

an impure intermediate product obtained in smelting ores.

Origin:
1550–60; < 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

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Regulus is always a great word to know.

So is solstice. Does it mean:

either of the two times a year when the sun is at its greatest distance from the celestial equator that takes place about June 21 and about December 22

the distance traversed by light in one mean solar year, about 5.88 trillion mi. (9.46 trillion km)

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Dictionary.com Unabridged

noun

Marcus A·til·i·us

[uh-til-ee-uhs] , died 250? b.c., Roman general.

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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins

World English Dictionary

regulus (ˈrɛɡjʊləs)

—n , pl -luses, -li
	impure metal forming beneath the slag during the smelting of ores

[C16: from Latin: a petty king, from rēx king; formerly used for antimony, because it combines readily with gold, thought of as the king of metals]

'reguline

—*adj*

Regulus¹ (ˈrɛɡjʊləs)

—n
	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

Regulus² (ˈrɛɡjʊləs)

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

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline

Word Origin & History

Regulus

"bright star in constellation Leo," 1559, from L., lit. "little king," dim. of rex "king;" probably a translation of Basiliskos "little king," a Hellenistic Gk. name for the star, mentioned in Geminos and Ptolemy (in the "Almagest," though elsewhere in his writings it is usually "the star on the heart

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of Leo"); perhaps a translation of Lugal "king," the Babylonian name for the star.

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American Heritage

Science Dictionary

Regulus

(rěg'yə-ləs) Pronunciation Key
A bright triple star in the constellation Leo, with an apparent magnitude of 1.35. Scientific name: Alpha Leonis.