The Collaborative International Dictionary of English v.0.48:
Adminicle \Ad*min"i*cle\, n. [L. adminculum support, orig., that
on which the hand rests; ad + manus hand + dim. ending
1. Help or support; an auxiliary. --Grote.
2. (Law) Corroborative or explanatory proof.
Note: In Scots law, any writing tending to establish the
existence or terms of a lost deed. --Bell.
Bouvier's Law Dictionary, Revised 6th Ed (1856):
ADMINICLE 1. A term, in the Scotch and French law, for any writing or deed
referred to by a party, in an action at law, for proving his allegations. 2.
An ancient term for aid or support. 3. A term in the civil, law for
imperfect proof. Tech. Dict. h.t.; Merl. Repert. mot Adminicule.