Definition of fiducia
: a contract used under Roman and civil law (as in the emancipation of children, in connection with testamentary gifts, and in pledges) and constituting essentially a contract of sale to a person usually by mancipation coupled with an agreement that the purchaser should sell the property back upon the fulfillment of certain conditions —called also contractus fiduciae
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Origin and Etymology of fiducia
Latin, literally, trust, confidence, from fidere to trust — more at bide
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