1. Operation on something past or preceding 
2. Action returned, or action backward

Derived forms: retroactions

• redbird flower
• redbone
• redbreast
• redbrick
• redbrick university
• redbrush
• redbud
• redbug
• redcap
• redcoat
• redd
• redd up
• redden
• reddened
• Redding
• reddish
• reddish blue
• reddish brown
• reddish orange
• reddish-gray
• reddish-grey
• reddish-lavender
• reddish-pink
• reddish-purple
• reddish-striped