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/θʌɪ.ə(ʊ)/ · prefix
(chemistry) containing sulfur, especially a compound in which oxygen has been replaced by this element.
Chalcogen analogues of monocarboxylic acids with retained names may also be named by placing the prefix ‘thio’, ‘seleno’, or ‘telluro’ in front of the name of the acid.
Use thio- when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Thio- means (chemistry) containing sulfur, especially a compound in which oxygen has been replaced by this element.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Chalcogen analogues of monocarboxylic acids with retained names may also be named by placing the prefix ‘thio’, ‘seleno’, or ‘telluro’ in front of the name of the acid.
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