1. A hard coarse-grained siliceous sandstone
   - grit, gritstone

Derived forms: gritrocks

Type of: sandstone

• intervention
• interventionism
• interventionist
• interventricular foramen
• intervertebral
• intervertebral disc
• intervertebral disk
• intervertebral vein
• interview
• interviewee
• RPA-ABB
• RPI
• rpm
• RRSP
• RSI
• RSP
• RSPB
• RSPCA
• RSS
• RSVP
• rt
• Rt Hon
• RTLT
• Ru
• RU 486