iron-mould (US iron-mold)

n [U] brown mark caused by iron-rust or an ink-stain 铁锈迹; 墨迹.

IRBM, ire, Ireland, iridescence, iridescent, iridium, iris, Irish, Irish coffee, Irish setter (also red setter), Irish stew, Irishman, irk, irksome, iron, iron foundry, iron lung, iron ore, iron rations, iron-grey, ironclad, ironic, ironical, ironically, ironing, ironing-board, ironmonger, ironmongery, ironstone, ironware, ironwork, ironworks, irony, irradiate, irradicable, irrational, irrationality, irrationally, irreconcilable, irreconcilably,