- (transitive) To make something slightly, or moderately acid; to acidify
- (transitive) To make sour in a moderate degree; to sour somewhat
- (transitive) To use an acidic catalyst. The chemical change being emphasised over the importance of the change in ph. Used in the processing of biodiesel co-products.
to make something slightly, or moderately acid
to make sour in a moderate degree
to use an acidic catalyst
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