Retarder

Retarder may refer to:

Retarder (album), an album by The Unband
Retarder (chemistry), a chemical agent that slows down a chemical reaction
Retarder (mechanical engineering), a device for slowing down large trucks, lorries, buses, coaches and other vehicles
Retarder (railroad), a device to slow railroad freight cars as they are sorted into trains
Acrylic retarder, a chemical agent added to fine art acrylic paint to slow its short drying time
Dough retarder, a refrigerator used to slow down proofing of yeast when making dough
Retardation plate, an optical device that alters the polarization state of a light wave traveling through it
A component in weapons that slow down their rate of fire

See also