- ,(chemistry) a dithioacetal produced by an aldehyde
- anybody of a number of substances of mercaptans with aldehydes.
- The name of a class of compounds containing the group , where R is any hydrocarbon radical and Alk is an alkyl-group particularly methyl or ethyl. The compounds are natural oils with a highly offensive smell, and generally are also referred to as thioacetals. They truly are regarding mercaptan in the same way that the acetals are to liquor.