from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A disease of plants caused by fungus; rust.
from the GNU version of the Collaborative International Dictionary of English
- n. A disease of plants caused by fungi, commonly called the rust, from its resemblance to iron rust in color.
from The Century Dictionary and Cyclopedia
- n. In botany, a disease of plants commonly called rust (which see).
Latin, iron rust, from ferrum ("iron"). (Wiktionary)