1. An unsaturated acid (C4H6O2) used to make resins and plastics
   - methacrylic acid

Type of: acid

• rear admiral
• rear back
• rear lamp
• rear light
• rear of barrel
• rear of tube
• rear window
• rear-end
• rearguard
• rearing
• rearm
• rearmament
• rearmost
• rearrange
• rearrangement
• rearrest
• rearview mirror
• rearward
• rearwards
• reascend
• reason
• reason out
• reasonable
• reasonable care
• reasonableness