1. of, relating to, or containing acetic acid or vinegar
Usage: technical; chemistry
2. sour or acidic in taste or quality

Examples

• The acetous solution was used in the laboratory experiment.
• The wine had developed an acetous flavor after prolonged exposure to air.
• Acetous fermentation converts alcohol into acetic acid.
• The acetous smell indicated the presence of vinegar in the mixture.
• Bacteria responsible for acetous decomposition are commonly found in nature.