fidei committo

fĭdĕĭ-committo (also separately fidei committo ), mīsi, missum, 3, v. n. and a. [fides; lit., to intrust a thing to a person's good faith; hence], jurid. t. t., to leave any thing by last will and testament to be delivered to a third party, to bequeath in trust:

pater filium praedia alienare prohibuerat, sed conservare liberis et ceteris cognatis fideicommiserat,

Dig. 32, 1, 38:

avia nepotibus heredibus institutis fideicommisit, ut solida legata fratribus solverent,

ib. 35, 2, 14; 30, 1, 114; § 3:

qui intestato decedit et scit bona sua ad fiscum perventura vacantia, fidei fisci committere potest, ib. § 2: fideicommissa libertas,

given by fideicommissum, Gai. Inst. 2, 267; Dig. 40, 5, 1 sq.—Hence, fĭdĕĭcommissum, i, n., a bequest given for the benefit of a third person, by way of request, not of command; and held to be equitably due out of respect to the wish of the testator (cf. legatum):

fideicommissum est quod non civilibus verbis, sed precative relinquitur, nec ex rigore juris civilis proficiscitur, sed ex voluntate datur relinquentis,

Ulp. Fragm. 25, 1:

De fideicommissis,

Dig. 30 -32; Gai. Inst. 2, 246-289; Cod. Just. 6, 42; Suet. Claud. 23; Quint. 3, 6, 70; 9, 2, 74.