Main Entry: pre·sump·tive

Pronunciation: \-ˈzəm(p)-tiv\

Function: adjective

Date: 15th century

1 : based on probability or presumption <the presumptive nominee>
2 : giving grounds for reasonable opinion or belief
3 : being an embryonic precursor with the potential for forming a particular structure or tissue in the normal course of development <presumptive retina>

— pre·sump·tive·ly adverb