Adjective:

1. having a reasonable basis for belief or acceptance;

   "the presumptive heir (or heir apparent)"
   

2. affording reasonable grounds for belief or acceptance;

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

conjecturaladj.推测的；好推测的

theoreticaladj.理论上的

probableadj.很可能的n.很可能的事

likelyadj.可能的；可信的adv.很可能

plausibleadj.似真实合理的；动听的；看起来有道理的，貌似可信的

convincingadj.使人信服的；有力的；令人心悦诚服的动词convince的现在分词.

reasonableadj.合理的；通情达理的；公平适度的

possibleadj.可能的；尽可能的；合理的n.适合候选的人

ostensibleadj.表面的；假装的

apparentadj.明显的；表面上的

1. It's just a presumptive diagnosis of bowel cancer.
   这只是对肠癌一个推定的诊断。