acetalPronunciation: /ˈasɪtal/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 acid + al from alcoholacetal in other Oxford dictionaries Definition of acetal in the US English dictionary
