Adjective
Able to be summed (able to be added); that is, able to be summed up (able to be added up); thus: Addible.
Usage- not-comparable
Able to be summed (able to be added); that is, able to be summed up (able to be added up); thus: Able to be summarized; summarizable.
Usage- not-comparable
Having a Lebesgue integral.
Usage- not-comparable
- of a function