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Containing sulfur, used especially of a compound in which oxygen has been replaced by a divalent sulfur: thiourea.
[Greek theio-, from theion, sulfur.]
thio-or before a vowel
(Elements & Compounds) indicating that a chemical compound contains sulphur, esp denoting that a compound is derived from a specified compound by the replacement of an oxygen atom with a sulphur atom: thiol; thiosulphate.
[from Greek theion sulphur]
a combining form meaning “sulfur” (thiobacillus), used esp. in the names of chemical compounds in which part or all of the oxygen atoms have been replaced by sulfur (thiosulfuric acid).Also, esp. before a vowel,thi-.
[comb. form representing Greek theîon]