acetal Syllabification: (ac·e·tal)Pronunciation: /ˈasiˌtal/Definition of acetal noun Chemistry an organic compound formed by the condensation of two alcohol molecules with an aldehyde molecule. Acetals have the general formula R1CH(OR2)2, where R1 and R2 are alkyl groups Origin: mid 19th century: from acetic + -al from alcohol, aldehydeacetal in other Oxford dictionaries Definition of acetal in the British & World English dictionary
