presumptive
1. [ adjective ] having a reasonable basis for belief or acceptance;
Examples:

"the presumptive heir (or heir apparent)"

Related terms: probable
2. [ adjective ] affording reasonable grounds for belief or acceptance
Examples:

"presumptive evidence" "a strong presumptive case is made out"

Related terms: credible
Similar spelling:   presumptively
  presumption
  presumed
  presumptuous
  prismatoid
  presume_to
  presumable
  presumptuously
  Prosimii
  prismatic