(inorganic chemistry) An unstable binary compound, SO, of sulfur and oxygen.

any ore containing elemental sulfur, or a sulfide from which it may be obtained

salt with about 3% added sulfur; supplied in blocks as a feed supplement for cattle and sheep

sulphurwort

the mineral pyrite

An array of geothermal vents in the Lassen Volcanic National Park, California

The ring-necked parakeet, Psittacula krameri

a shower bath using sulfurous water, especially as part of a curative therapy

(American spelling) a spring of naturally sulfurous water, often of volcanic origin and therefore hot

Rain that has a pale yellow colour caused by impurities picked up by the falling raindrops.