rust fungus(n = noun.plant) rust - any of various fungi causing rust disease in plants;
is a kind of fungus
has parts: aecium, aeciospore
is a member of order uredinales, uredinales
has particulars: flax rust, flax rust fungus, melampsora lini, blister rust, cronartium ribicola, puccinia graminis, wheat rust, apple rust, cedar-apple rust, gymnosporangium juniperi-virginianae

apple rust, ascomycetous fungus, beefsteak fungus, bird's-nest fungus, black root rot fungus, blister rust, blue mold fungus, bottom rot fungus, bracket fungus, brown root rot fungus, carrion fungus, cedar-apple rust, club fungus, clubroot fungus, coffee fungus, coral fungus, cup fungus, damping off fungus, dutch elm fungus, ear fungus, face fungus, felt fungus, flag smut fungus, flax rust, flax rust fungus, fly fungus, fungus, fungus family, fungus genus, fungus gnat, fungus kingdom, fungus order, gill fungus, green smut fungus, honey fungus, jack-o-lantern fungus, jelly fungus, leak fungus, orange peel fungus, oyster fungus, pink disease fungus, pore fungus, potato fungus, potato wart fungus, ring rot fungus, ring-stalked fungus, rust, rust inhibitor, rust mite, sac fungus, shelf fungus, shoestring fungus, smut fungus, tooth fungus, true fungus, urn fungus, wheat rust, white fungus, white pine blister rust, white rust, white-pine rust, yellow spot fungus