a. rare. [f. as prec. + -AN.] = FERREOUS 2.

1

1656–81.  Blount, Glossogr., Ferrean, iron-like; hard-hearted, cruel.

2

1828.  Southey, The Gridiron, vi., in Life (1850), V. 364.

        Nothing can come of nothing: from the air
        The ferrean atoms came.

3

  [In some mod. Dicts.]

4