A nonoxidizing acid is an acid that cannot act as an oxidizing agent. While many acids are good oxidizers, they don't all technically oxidize in any given reaction.
Nonoxidizing Acid Examples
Hydrochloric acid, hydroiodic acid, hydrobromic acid, hydrofluoric acid, phosphoric acid are all nonoxidizing acids.
Example Use
The element beryllium dissolves in a nonoxidizing acid, such as hydrochloric or dilute sulfuric acid, but not in water or nitric acid.