ferric

The ferric oxide gives rust its reddish color.

用法提示：ferric作为形容词，修饰oxide，表示含铁的氧化物。

Ferric chloride is commonly used in water treatment plants.

用法提示：ferric直接修饰chloride，表示该化合物含三价铁。

The solution turned yellow due to the presence of ferric ions.

用法提示：ferric修饰ions，表示三价铁离子。