Tutiorism, see Systems, Moral.
Tyrannicide, lawfulness of, 1824 a.
Unbelief, Sin of, negative and positive, 813; ordinary and apostasy, 814; direct and indirect, 815-816; non-assent, 817; dissent (private and contrary unbelief), 818; infidelity, 822 a; order of gravity in unbelief, 824; dangers which lead to external expression of unbelief, 944 sqq. See also Heresy; Apostasy.
Unction, Extreme, Sacrament of, 2774; remote matter, 2774 a; proximate matter, 2774 b; form, 2774 c; recipient, 2774 d; minister, 2774 e; effects of, 2774 f; special duties of recipient, 2775 a; special duties of minister, 2775 b; special duties of pastor, 2775 c; special duties of faithful, 2775 d.
Understanding, integral part of prudence, 1637 a.
Understanding, Gift of, 160 a; given to perfect theological virtues, 808.
Unity of the Church, threefold, 1367.
Uranism, form of impurity, 2534 c.
Use, act of will, 59.
Usury, definition, 2136.