Definitions

1. adjective

having the color or appearance of rust, or a reddish-brown color

“The eruginous patina on the old bronze statue was a testament to its age.”

2. adjective

resembling or covered with rust

“The eruginous surface of the corroded metal was hazardous to handle.”

3. noun

a reddish-brown color, especially one resembling rust

“The eruginous hue of the sunset was breathtaking.”