Acetal n. : A limpid, colorless, inflammable liquid from the slow oxidation of alcohol under the influence of platinum black.

Example:
What is the major difference between a cyclic hemiAcetal and a cyclic Acetal?

Taxonomy
acetal, Acetals, free encyclopedia, alcohol, stable, carbon atom, product, ketal, reaction mixture, search, molecule, oxygens, R group, terminology, ketals, subset, polyacetal, cyclic hemiacetal.

Defination from the web:
acetal proceeds, water must be removed from the reaction mixture or it will hydrolyse the product. ... Water produced along with the acetal product is used up in hydrolysing the orthoester and producing more alcohol to be used in the reaction. ...