1. not having the property that the whole equals the sum of its parts
Usage: mathematics; science

Examples

• The interaction between the two drugs was nonadditive, producing unexpected side effects.
• In genetics, some traits show nonadditive inheritance patterns.
• The researcher discovered that the combined effect was nonadditive.
• Nonadditive models are used when simple addition doesn’t explain the results.
• The team’s performance was nonadditive – together they achieved less than expected.
• Chemical reactions often involve nonadditive properties.