ferruginous adjective. [fɛ'ru:dʒɪnǝs] M17.
[from Latin ferrugo, -gin- iron rust, dark red (from ferrum iron) + -OUS. Cf. French ferrugineux.]
1. Of the nature of or containing iron or its compounds (orig. iron rust). M17.

2. Of the colour of rust; reddish-brown. M17.
ferruginous duck a diving duck, Aythya nyroca, with predominantly dark rust-brown plumage; also called white-eyed pochard.

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