LATIN DICTIONARYLexicon Latīnum
noun · neuterthird declension

sulfur

sulfur n (genitive sulfuris)
Classical[ˈsʊɫ.fʊr]Ecclesiastical[ˈsul.fur]

Meaning

  1. neutersulfur, brimstone
  2. neuterlightning

Latīnē defined in Latin in our graded readers

māteria flāva ārdēns
sulpur -uris (n) — in Epistulae, ch. 16

Declension

declension
formsingularplural
nominativesulfursulfura
sulfurēs
genitivesulfurissulfurum
sulfurium
dativesulfurīsulfuribus
accusativesulfur
sulfurem		sulfura
sulfurēs
ablativesulfuresulfuribus
vocativesulfursulfura
sulfurēs

sulfur (in MSS. also sulphur and sulpur), ŭris, n. (
I. masc., Tert. adv. Prax. 16; Veg. Vet. 1, 38 med.), brimstone, sulphur.
I. Lit., Plin. 35, 15, 50, § 174; Cato, R. R. 39, 1; Col. 8, 5, 11: vivum, Liv. 39, 13, 12; Ov. F. 4, 739; Lucr. 6, 221; 6, 748; 6, 807; Tib. 1, 5, 11; Prop. 4 (5), 8, 86; Ov. M. 5, 405 et saep.—Plur.: viva, Verg. G. 3, 449: vivacia, Ov. M. 3, 374: lurida, id. ib. 14, 791; 15, 351; Quint. 12, 10, 76 Spald. N. cr.; used as a cement, Juv. 5, 48.—
II. Transf., poet., lightning (so called from its sulphureous smell): aethereum, Luc. 7, 160: satrum, Pers. 2, 24.

Origins

From Hellenization of sulpur, of uncertain origin.

Quick answers

What does sulfur mean in Latin?
sulfur, a noun, means “sulfur, brimstone; lightning”.
What is the genitive of sulfur?
The genitive singular is sulfuris. sulfur is neuter, third declension.
How do you pronounce sulfur?
In classical Latin, [ˈsʊɫ.fʊr]; in ecclesiastical (church) Latin, [ˈsul.fur].