sulfur
n. uncountablen. a yellow chemical element that has a strong, unpleasant smell when it burns — like rotten eggs.
n. a non-metallic chemical element with atomic number 16, typically appearing as a yellow crystalline solid. Often associated with volcanic activity and the production of sulfuric acid.
Sulfur is a bright yellow mineral found near volcanoes.
The match head contains sulfur, which helps it ignite when you strike it against a rough surface.
In the early industrial era, the high sulfur content in coal led to significant atmospheric pollution, eventually resulting in the phenomenon known as acid rain.
From Middle English sulphur, borrowed from Anglo-Norman sulfre, from Latin sulfur, from sulpur itself of uncertain origin. Displaced Old English swefl and largely displaced brimstone.
Uncountable when referring to the element; can be countable when referring to specific chemical forms or isotopes.
the smell of sulphurthe smell of sulfurWhile 'sulphur' is the traditional British spelling, 'sulfur' is the standard international spelling used in scientific and American contexts.