from
The Collaborative International Dictionary of English v.0.48
Ferric \Fer"ric\, a. [L. ferrum iron: cf. F. ferrique. See
{Ferrous}.]
Pertaining to, derived from, or containing iron. Specifically
(Chem.), denoting those compounds in which iron has a higher
valence than in the ferrous compounds; as, ferric oxide;
ferric acid.
[1913 Webster]
{Ferric acid} (Chem.), an acid, {H2FeO4}, which is not known
in the free state, but forms definite salts, analogous to
the chromates and sulphates.
{Ferric oxide} (Chem.), sesquioxide of iron, {Fe2O3};
hematite. See {Hematite}.
[1913 Webster]