adj.
Pronunciation: ' nän- ' a-d ə -tiv
Function: adjective
Date: 1926
1 : not having a numerical value equal to the sum of values for the component parts
2 : of, relating to, or being a genic effect that is not additive
– non · ad · di · tiv · i · ty \ ˌ nän- ˌ a-d ə - ' ti-v ə -t ē \ noun