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sulfurous of, pertaining to, or containing sulfur. [3 definitions]
sulfurous acid an acid with a suffocating aroma of sulfur, occurring in solution with water or in salt form and used as a bleach, disinfectant, and reagent.
sulfur oxide any of several oxides of sulfur.
sulfury of, resembling, or characteristic of sulfur. [2 definitions]
sulk to express resentment or bad humor by remaining sullenly silent or aloof. [3 definitions]
sulky in a sullen, bad-tempered mood, esp. for no good reason. [4 definitions]
sullage refuse, waste, or sewage. [2 definitions]
sullen silently indicating resentment or bad temper. [3 definitions]
sully to make dirty or tarnished. [2 definitions]
sulphur variant of sulfur.
sulphur-bottom the blue whale.
sultan the ruler of an Islamic country. [2 definitions]
sultana the mother, sister, wife, or daughter of a sultan. [3 definitions]
sultanate the office or authority of a sultan. [2 definitions]
sultry uncomfortably hot and humid. [2 definitions]
sum the total number or quantity that results from adding two or more numbers or quantities. [6 definitions]
sum- under; secretly.
sumac any of several small trees or shrubs bearing compound feathery leaves and clusters of red or whitish berries. (See poison sumac.) [2 definitions]
Sumatra a large island of western Indonesia in the Indian Ocean.
Sumer a region of ancient civilizations in what is now southern Iraq.
Sumerian of or pertaining to Sumer or its people, culture, language, or the like. [3 definitions]