LATIN DICTIONARYLexicon Latīnum
adjectivefirst/second-declension adjective

caeruleus

caeruleus (feminine caerulea, neuter caeruleum)
Classical[kae̯ˈrʊ.ɫe.ʊs]Ecclesiastical[t͡ʃeˈruː.le.us]
caeruleum sg. nom. n.; sg. acc. m.; sg. acc. n.; sg. voc. n.Mille Verba core vocabulary

Meaning

  1. adjectiveDyed or colored blue
  2. adjectiveColored with woad
  3. adjectiveUsed as an epithet of sea and river deities or things connected with them
  4. adjectiveGlossy greenish-blue
  5. adjectiveBlue-eyed
  6. adjectiveDark-colored, dusky, gloomy
  7. adjectiveDark-colored, dusky, gloomy
  8. adjectiveA spring and aqueduct at Rome
  9. adjectiverareOf or connected with the sky, celestial

Latīnē defined in Latin in our graded readers

colōre caelī serēnī et maris.
caeruleus -a -um — in Mille Verba, Colōrēs

Declension

singular
formmasculinefeminineneuter
nominativecaeruleus
ceruleus, coeruleus
caerulea
caerula, cerulea, coerulea
caeruleum
caerulum, ceruleum, coeruleum
genitivecaeruleī
caerulī, ceruleī, coeruleī
caeruleae
caerulae, ceruleae, coeruleae
caeruleī
caerulī, ceruleī, coeruleī
dativecaeruleō
caerulō, ceruleō, coeruleō
caeruleae
caerulae, ceruleae, coeruleae
caeruleō
caerulō, ceruleō, coeruleō
accusativecaeruleum
caerulum, ceruleum, coeruleum
caeruleam
caerulam, ceruleam, coeruleam
caeruleum
caerulum, ceruleum, coeruleum
ablativecaeruleō
caerulō, ceruleō, coeruleō
caeruleā
caerulā, ceruleā, coeruleā
caeruleō
caerulō, ceruleō, coeruleō
vocativecaerulee
caerule, cerulee, coerulee
caerulea
caerula, cerulea, coerulea
caeruleum
caerulum, ceruleum, coeruleum
plural
formmasculinefeminineneuter
nominativecaeruleī
caerulī, ceruleī, coeruleī
caeruleae
caerulae, ceruleae, coeruleae
caerulea
caerula, cerulea, coerulea
genitivecaeruleōrum
caerulōrum, ceruleōrum, coeruleōrum
caeruleārum
caerulārum, ceruleārum, coeruleārum
caeruleōrum
caerulōrum, ceruleōrum, coeruleōrum
dativecaeruleīs
caerulīs, ceruleīs, coeruleīs
caeruleīs
caerulīs, ceruleīs, coeruleīs
caeruleīs
caerulīs, ceruleīs, coeruleīs
accusativecaeruleōs
caerulōs, ceruleōs, coeruleōs
caeruleās
caerulās, ceruleās, coeruleās
caerulea
caerula, cerulea, coerulea
ablativecaeruleīs
caerulīs, ceruleīs, coeruleīs
caeruleīs
caerulīs, ceruleīs, coeruleīs
caeruleīs
caerulīs, ceruleīs, coeruleīs
vocativecaeruleī
caerulī, ceruleī, coeruleī
caeruleae
caerulae, ceruleae, coeruleae
caerulea
caerula, cerulea, coerulea

caerŭlĕus, and in poetry equally common, caerŭlus, a, um, adj. cf. cae -sius, κύανος, and Sanscr. cjamas = dark
I. Lit., dark-colored, dark blue, dark green, cerulean, azure, κυάνεος; poet. epithet of the sky, of the sea, and other similar objects (as dark, opp. albus and marmoreus color, Lucr. 2, 771 sq., and syn. with ater, Verg. A. 3, 64; v. under II. A.).
A. Of the sky: caeli caerula templa, Enn. ap. Cic. Div. 1, 20, 40 (Ann. v. 50 Vahl.); id. ap. Varr, L. L. 7, § 6 Müll. (Ann. v. 66 Vahl.); cf.: (zonae) extremae Caeruleā glacie concretae, Verg. G. 1, 236.—Also subst.: caerŭla. ōrum, n., Ov. M. 14, 814: per caeli caerula, Lucr. 1, 1089; 6, 96; and without caeli, id. 6, 482.—Of the universe: magni per caerula mundi, Lucr. 5, 770; and of the brightness of the stars: bigae, Verg. Cir. 37.—Of mountain heights, Ov. M. 11, 158; cf. candor, Plin. 35, 6, 28, § 47: splendor, id. 37, 9, 51, § 134.—
B. Of the sea: ponti plaga caerula, Lucr. 5, 482; cf. id. 2, 772 sq.: pontus, Cat. 36, 11; Ov. M. 13, 838: mare, Cic. Ac. Fragm. ap. Non. p. 162, 30: aequora, Cat. 64, 7; so, campi = mare, Plaut. Trin. 4, 1, 15: aquae, Ov. M. 8, 229; 15, 699: undae, Tib. 1, 3, 37; 1, 4, 45; Varr. ap. Non. p. 254, 21: vada, Verg. A. 7, 198: gurges, Ov. M. 2, 528: color (lacus) caerulo albidi or, viridior et pressior, Plin. Ep. 8, 20, 4: Oceani amictus, Claud. Laud. Stil. 2, 249; App. M. 10, p. 254, 11.—Also subst.: cae-rŭla, ōrum, n., the sea, the blue surface of the sea: caerula verrunt, Verg. A. 4, 583; 3, 208; 8, 672; Stat. Th. 3, 250.—Of objects that have relation to the sea: di, sea-deities, Ov. M. 2, 8 sq.: deus, κατʼ ἐξοχήν, Neptune, Prop. 3 (4), 7, 62; cf. of the same: Jovis frater, Ov. M. 1, 275: Triton, id. ib. 1. 333: Nereus. id. H. 9, 14: Thetis, Tib. 1, 5, 46; and of the same: mater (sc. Achillis), Hor. Epod. 13, 16; Ov. M. 13, 288: Psamathe, a sea-nymph, id. ib. 11, 398: oculi Neptuni. Cic. N. D. 1, 30, 83: currus (Neptuni), Verg. A. 5, 819: equi (Tritonis), Ov. H. 7, 50: Scylla (navis), Verg. A. 5, 123; cf. color. Ov M. 14, 555: puppis, id. F. 2, 112; via. Plaut Rud. 1, 5, 10; Ov. H. 16, 104.—
C. Also of rivers and things that are connected therewith: caeruleus Thybris, Verg. A. 8, 64 amnis, Tib. 3, 4, 18; Stat. S. 1, 5, 51: Cydnus. Tib. 1, 7, 14: crines, Ov. M. 5, 432; guttae. id. ib. 5, 633.—
D. Of other darkblue objects: omnes se Britanni vitro inficiunt, quod caeruleum efficit colorem, atque hoc horridiores sunt in pugnā aspectu, Caes. B. G. 5, 14: an si caeruleo quaedam sua tempora fuco Tinxerit. idcirco caerula forma bona'st? Prop. 2, 18, 31 sq. (3, 11, 9 sq.); Mart. 11, 53, 1: olearum plaga, Lucr. 5, 1372; draco. Ov. M. 12, 13' angues, Verg. G. 4, 482; colla, id. A. 2, 381: serpens, Ov. M. 3, 38: guttae (serpentis), id. ib. 4, 578: vestis. Juv. 2. 97: vexillum, Suet. Aug. 25: flos (heliotropi), Plin. 22, 21, 29, § 57: oculi (Germanorum), Tac. G. 4; hence Germania pubes, Hor. Epod. 16, 7.—Hence, subst.: caerŭlĕum, i, n., a blue color, steel-color, both natural and artificial, Plin. 33, 13, 57, § 161 sq.; 35, 6, 28, § 47; Vitr. 7, 111; 9, 1.—
II. Transf.
A. In gen., dark, gloomy, dun, sable, black; poet. epithet of death, the night, rain, etc.: stant Manibus arae Caeruleis moestae vittis, Verg. A. 3, 64 Serv.: imber, id. ib. 3, 194; 5, 10: caeruleus (color) pluviam denuntiat, id. G. 1, 453; so, equi (Plutonis), Ov. F. 4, 446: ratis fati, Prop. 2 (3), 28, 40. puppis (Charontis), Verg. A. 6, 410: mors, Albin. ad Liv. 1, 93: nox, Stat. S. 1, 6, 85: umbra noctis, id. Th. 2, 528; Verg. Cir. 214: panis, Juv. 14, 128: baca (lauri), Plin. 15, 30, 39, § 128: bacis caerula tinus, Ov. M. 10, 98.—
B. Dark green, green, greenish: cucumis, Prop. 4 (5), 2, 43. coma, Ov. M. 11, 158: arbor Palladis, id. A. A. 2, 518: campi caerula laetaque prata, Enn. ap. Macr. S. 6, 3.
Caerŭlĕus, i, m.,
I. the name of an aqueduct at Rome, Plin. 36, 15, 24, § 122; Suet. Claud. 20; Front. Aquaed. 13.

Origins

Dissimilation of *caeluleus, derived from caelum (“sky, heaven”) + -uleus (diminutive suffix). However, in Classical Latin the word is attested as denoting the color of the rainy sky and that of deep water, and was on the whole associated with water.

Descendants
  • Catalanceruli
  • Englishcerulean
  • Frenchcéruléen
  • Italianceruleo
  • Portuguesecerúleo
  • Romanianceruleu
  • Spanishcerúleo

In English words that came into English from caeruleus

  • ceruleancaeruleus
  • cerulecaerulus
  • ceruleumceruleum
  • subcoeruleuscoeruleus
  • ceruloplasmincaeruleus
  • cerulescencecaerulescens

Quick answers

What does caeruleus mean in Latin?
caeruleus, a adjective, means “Of or connected with the sky, celestial”.
How do you pronounce caeruleus?
In classical Latin, [kae̯ˈrʊ.ɫe.ʊs]; in ecclesiastical (church) Latin, [t͡ʃeˈruː.le.us].
Which English words come from caeruleus?
English words that go back to Latin caeruleus include cerulean, cerule, ceruleum, subcoeruleus, ceruloplasmin and cerulescence.