sulfur

Etymology

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.

noun

1. (uncountable) A chemical element (symbol S) with an atomic number of 16.
2. (countable, uncountable) A yellowish green colour, like that of sulfur.
   sulfur:
3. Any of various pierid butterflies of the subfamily Coliadinae, especially the sulfur-coloured species.
   Coordinate term: yellow

adj

1. Of a yellowish green colour, like that of sulfur.

verb

1. (transitive) To treat with sulfur, or a sulfur compound, especially to preserve or to counter agricultural pests.