fi·du·ci·ar·y (fĭ-dū'shē-ĕr'ē, -shə-rē, -dyū'-, fī-)
adj.

1. 1. Of or relating to a holding of something in trust for another: a fiduciary heir; a fiduciary contract.
   2. Of or being a trustee or trusteeship.
   3. Held in trust.
2. Of or consisting of fiat money.
3. Of, relating to, or being a system of marking in the field of view of an optical instrument that is used as a reference point or measuring scale.

n., pl., -ies.
One, such as an agent of a principal or a company director, that stands in a special relation of trust, confidence, or responsibility in certain obligations to others.

[Latin fīdūciārius, from fīdūcia, trust. See fiducial.]

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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