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• thio
  thio

  adjective

  containing sulfur, especially in place of oxygen.
• thio-
  thio-

  a combining form meaning “sulfur,” used in chemical nomenclature in the names of compounds in which part or all of the oxygen atoms have been replaced by sulfur; often used to designate sulfur analogues of oxygen compounds.
• thio–
  thio–

  A prefix that means “containing sulfur,” used especially of a compound in which an oxygen atom has been replaced by a sulfur atom, as in thiourea.

thio

¹ American  

[thahy-oh] / ˈθaɪ oʊ /

adjective

Chemistry.

1. containing sulfur, especially in place of oxygen.

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thio- ² American  

1. a combining form meaning “sulfur,” used in chemical nomenclature in the names of compounds in which part or all of the oxygen atoms have been replaced by sulfur; often used to designate sulfur analogues of oxygen compounds.

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thio- British  

combining form

1. 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

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thio– Scientific  

1. A prefix that means “containing sulfur,” used especially of a compound in which an oxygen atom has been replaced by a sulfur atom, as in thiourea.

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Etymology

Origin of thio¹

Independent use of thio-

Origin of thio-²

Combining form representing Greek theîon