Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of thio- is as below...

Thio- :: Thio- () A combining form (also used adjectively) denoting the presence of sulphur. See Sulpho-.

Sulphoarsenic :: Sulpho- () A prefix (also used adjectively) designating sulphur as an ingredient in certain compounds. Cf. Thio-.

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