\Fer*ru"gi*nous\, a. [L. ferruginus, ferrugineus,
fr. ferrugo, -ginis, iron rust: cf. F. ferrugineux. See
{Ferrugo}.]
1. Partaking of iron; containing particles of iron. --Boyle.
2. Resembling iron rust in appearance or color; brownish red,
   or yellowish red.