ampliative
adjective
am·pli·a·tive
ˈamplēˌātiv
logic
: adding in the predicate something not contained in the meaning of the subject term : synthetic
an ampliative proposition
—opposed to explicative 
Word History
Etymology
Medieval Latin ampliativus, from Latin ampliatus + -ivus -ive
First Known Use
1836, in the meaning defined above