1 [mass noun] the chemical element of atomic number 16, a yellow combustible non-metal:we should use coal which contains less sulphur [as modifier]:the islands are also renowned for their thermal springs and sulphur baths (Symbol: S)
the material of which hellfire and lightning were formerly believed to consist.
a pale greenish-yellow colour: [as modifier]:the bird’s sulphur-yellow throat
2an American butterfly with predominantly yellow wings that may bear darker patches.
Colias, Phoebis, and other genera, family Pieridae
Colias, Phoebis, and other genera, family Pieridae
