Naturally occurring elemental sulfur as deposited at the fumarole of a volcano.

The powdery spores of the club moss (Lycopodium clavatum)

Naturally occurring elemental sulfur

the sulfur-crested cockatoo

(pharmacology) Used to form names of sulfonamides used as antiinfectives.

(botany) Alternative spelling of sulfur tree

A yellow poisonous mushroom, Hypholoma fasciculare (= Naematoloma fasciculare).

Alternative spelling of sulfa- / (dated, chemistry) sulfur compounds

a very large, but harmless, bacterium, Thiomargarita namibiensis, that grows as a string of white beads large enough to be visible to the naked eye in the coastal sediments of Namibia

Alternative spelling of sulfur hexafluoride