fiducial

形容词 fiducial:

1. relating to or of the nature of a legal trust (i.e. the holding of something in trust for another)
   同义词：fiduciary
2. used as a fixed standard of reference for comparison or measurement
3. based on trust

fi.du.cial

adj.（形容词）
Based on or relating to faith or trust.
基于信仰的：基于信仰或信任的，与信仰或信任有关的
Relating to or characteristic of a legal trust; fiduciary.
信用的，信托的：与合法的委托有关的或有此特性的；信托的
Regarded or employed as a standard of reference, as in surveying.
基准的：在测量勘定时认为或作为基准的

来源：
Late Latin fodôci3lis
后期拉丁语 fodôci3lis
from Latin fodôcia [trust]
源自 拉丁语 fodôcia [信任]
from fodere [to trust] * see bheidh-
源自 fodere [对…信赖] *参见 bheidh-

【引伸】
fidu.cially
adv.（副词）