1. a chemical compound that contains two replaceable hydrogen atoms or two acidic groups
Usage: chemistry; technical

1. having two replaceable hydrogen atoms or two acidic groups; capable of donating two protons
Usage: chemistry; technical

Examples

• Sulfuric acid is a diacid because it can donate two hydrogen ions.
• Oxalic acid is a common diacid found in plants.
• The diacid compound reacted with two moles of base in the titration.
• Malonic acid is a diacid used in organic synthesis.
• Diacid molecules have two carboxylic acid groups.