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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A bright double star in the constellation Leo.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • proper n. A taxonomic genus within the family Regulidae — the goldcrests and kinglets.
  • proper n. A star in the constellation Leo; alpha (α) Leonis.


Latin rēgulus, diminutive of rēx, rēg-, king; see regulus.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin regulus ("kinglet, petty king") (Wiktionary)
Latin regulus ("petty king"). (Wiktionary)



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