| • | The reddish yellow coating formed on iron when exposed to
   moist air, consisting of ferric oxide or hydroxide; hence, by
   extension, any metallic film of corrosion. | 
											
															| • | A minute mold or fungus forming reddish or rusty spots on the
   leaves and stems of cereal and other grasses (Trichobasis Rubigo-vera),
   now usually believed to be a form or condition of the corn mildew
   (Puccinia graminis). As rust, it has solitary reddish spores; as corn
   mildew, the spores are double and blackish. | 
											
															| • | That which resembles rust in appearance or effects. | 
											
															| • | A composition used in making a rust joint. See Rust joint,
   below. | 
											
															| • | Foul matter arising from degeneration; as, rust on salted
   meat. | 
											
															| • | Corrosive or injurious accretion or influence. | 
											
															| • | To contract rust; to be or become oxidized. | 
											
															| • | To be affected with the parasitic fungus called rust;
   also, to acquire a rusty appearance, as plants. | 
											
															| • | To degenerate in idleness; to become dull or impaired by
   inaction. | 
											
															| • | To cause to contract rust; to corrode with rust; to affect
   with rust of any kind. | 
											
															| • | To impair by time and inactivity. |