rja
1. rja
a plant disease that produces a reddish-brown discoloration of leaves and stems; caused by various rust fungi [bolezen rastlin, ki povzroči rjavo obarvanje listov in stebel; povzročitelji so različne vrste rjave gobe]
2. rja
a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture [rdeč ali rjav oksidacijski premaz na železu ali jeklu, ki ga povzročita kisik in vlaga.]