(uncountable) The state or quality of being sulky. / (countable) The result or product of being sulky.

(British spelling, chemistry) Alternative spelling of sulfide

A kind of clear marble with a small statuette or figure inside.

(inorganic chemistry, chiefly British spelling) Alternative spelling of sulfurous acid

(inorganic chemistry, chiefly British spelling) Alternative spelling of sulfite / (obsolete) A person who is spontaneous and original in thought and conversation.

(physics) The major stable isotope of sulfur, ³²₁₆S, having sixteen protons and sixteen neutrons; it amounts to 95% of the element in nature

(physics) A minor stable isotope of sulfur, ³⁴₁₆S, having sixteen protons and eighteen neutrons; it amounts to about 4% of the element in nature

(physics) A radioactive isotope of sulfur, ³⁵₁₆S, having sixteen protons and nineteen neutrons, and a half-life of about 87 days; it is used as a tracer

(physics) A minor stable isotope of sulfur, ³³₁₆S, having sixteen protons and seventeen neutrons; it amounts to less than 1% of the element in nature

(physics) A minor stable isotope of sulfur, ³⁶₁₆S, having sixteen protons and twenty neutrons; it amounts to only 0.01% of the element in nature