We found 14 dictionaries that define the word additivity:

General (6 matching dictionaries)

1. additivity: Merriam-Webster
2. additivity: Collins English Dictionary
3. additivity: Wordnik
4. additivity: Wiktionary
5. additivity: Dictionary.com
6. additivity: TheFreeDictionary.com

Business (1 matching dictionary)

7. additivity: Legal dictionary

Computing (1 matching dictionary)

8. additivity: Encyclopedia

Medicine (3 matching dictionaries)

9. additivity: Merriam-Webster Medical Dictionary
10. online medical dictionary (No longer online)
11. additivity: Medical dictionary

Science (2 matching dictionaries)

12. A Glossary of Mathematical Terms (No longer online)
13. additivity: PlanetMath Encyclopedia

Tech (1 matching dictionary)

14. Schlumberger Oilfield Glossary (No longer online)

(Note: See additive as well.)

Definitions from Wiktionary (additivity) ▸ noun:  (uncountable, mathematics) The property of being additive. ▸ noun:  (countable) The extent to which something is additive. Similar: additiveness, superadditivity, σ-additivity, countable additivity, addition, underadditivity, subadditivity, sigma additivity, multiplicativity, additive group, more... Opposite: subtractivity, non-additivity Types: associativity, commutativity, distributivity, more... Phrases: countable additivity, value additivity principal, sigma additivity, more... Adjectives: non, countable, simple, finite, complete, sub, linear, direct, strict, perfect, supra ▸ Words similar to additivity ▸ Usage examples for additivity ▸ Idioms related to additivity ▸ Wikipedia articles (New!) ▸ Popular adjectives describing additivity ▸ Words that often appear near additivity ▸ Rhymes of additivity ▸ Invented words related to additivity