dust·er 
/ˈdʌstɚ/ noun
plural dust·ers /ˈdʌstɚ/ noun [count] 1 : something that removes dust
▪ a feather duster [=a tool with feathers at one end used to remove dust] 2 US : a device that is used by farmers to spray chemicals (such as pesticides) over a large area
▪ a crop duster 3 US, somewhat old-fashioned : a long light coat
▪ He wore a tan duster.
▪ a feather duster [=a tool with feathers at one end used to remove dust]
▪ a crop duster
▪ He wore a tan duster.
