noun · masculinesecond declension
rēgulus1
rēgulus m (genitive rēgulī)
Classical[ˈreː.ɡʊ.ɫʊs]Ecclesiastical[ˈrɛː.ɡu.lus]
Meaning
- A petty king, kinglet
- kinglet (bird), wren
- a basilisk; a venomous serpent
c. AD 382-405, Eusebius Sophronius Hieronymus, Biblia Sacra Vulgata, Liber Proverbiorum 23:31-32
Look not upon the wine when it is yellow, when the colour thereof shineth in the glass: it goeth in pleasantly, / But in the end, it will bite like a snake, and will spread abroad poison like a basilisk.
Latīnē defined in Latin in our graded readers

parvus rēxrēgulus -ī (m) — in IVLIANVS II: Imperium, ch. 2 and IVLIANVS III: Persia, ch. 4
Declension
| form | singular | plural |
|---|---|---|
| nominative | rēgulus | rēgulī |
| genitive | rēgulī | rēgulōrum |
| dative | rēgulō | rēgulīs |
| accusative | rēgulum | rēgulōs |
| ablative | rēgulō | rēgulīs |
| vocative | rēgule | rēgulī |
Lewis & Short A Latin Dictionary, 1879
rēgŭlus, i, m. dim. rex.
I. The ruler of a small country (Gr. δυνάστης), a petty king, prince, chieftain, lord (freq. in the historians;
not in Cæs. or Cic.): regulos se acceptos in fidem in Hispaniā reges reliquisse, Liv. 37, 25; Sall. J. 11, 2; Liv. 5, 38; 27, 4; 29, 4 al.: Cilicum reguli, Tac. A. 2, 80; id. Agr. 24; Suet. Calig. 5; Vulg. Josue, 13, 3 al.— II. Transf.
A. Of the king-bee, Varr. R. R. 3, 16, 18.—
B. A king's son, a prince (cf. rex and regina), Liv. 42, 24, 10; 45, 14, 6 al.—
C. A small bird, Auct. Carm. Phil. 13.—
D. A kind of serpent, Hier. in Isa. 16, 59, 6; Vulg. Prov. 23, 32; id. Isa. 30, 6.
Origins
From Proto-Italic *rēgelos, from Proto-Indo-European *h₃rḗǵelós. Equivalent to rēx (“king”) + -ulus (diminutive suffix). Sense 3 is a semantic loan from Ancient Greek βασιλίσκος (basilískos).
Descendants
- Englishregulus
- Italianregolo
- Spanishrégulo