rusts Definition

to form rust : become oxidized

to degenerate especially from inaction, lack of use, or passage of time

to become reddish brown as if with rust

the reddish brittle coating formed on iron especially when chemically attacked by moist air and composed essentially of hydrated ferric oxide

a comparable coating produced on a metal other than iron by corrosion

something resembling rust : accretion

any of several diseases of pines that are caused by rust fungi (genus Cronartium) in the aecial stage and that affect the sapwood and inner bark and produce blisters externally

a gall-producing disease especially of the apple caused by a rust fungus (Gymnosporangium juniperi-virginianae) that completes the first part of its life cycle on the common red cedar (Juniperus virginiana) and the second on the leaves and fruit of the apple

a leaf rust of oats and other grasses that is caused by a fungus (Puccinia coronata) and is characterized by rounded light-orange uredinia and buried telia

a rust disease of plants and especially of wheat that affects primarily the leaves

the uredinial stage of a rust

the diseased condition produced by red rust

a rust attacking the stem of a plant; especially : a destructive disease especially of wheat caused by a rust fungus (Puccinia graminis) which produces reddish-brown lesions in the uredospore stage and black lesions in the teliospore stage and has any of several plants of the barberry family as an intermediate host

the fungus causing stem rust

a destructive disease of wheat caused by rust fungi; also : a fungus (such as Puccinia graminis) causing a wheat rust

any of various diseases of chiefly cruciferous plants caused by a fungus (genus Albugo) and marked by white spore-filled lesions; also : a fungus causing white rust